| 2pi-Labs GmbH | GERMANY | Manufacturer |
| 3db Access AG | SWITZERLAND | Manufacturer |
| 3xA Security AB | SWEDEN | Consultancy Company/Partnership |
| 450connect GmbH | GERMANY | Network Operator |
| 7LAYERS GmbH | GERMANY | Consultancy Company/Partnership |
| A.S.P. | UNITED KINGDOM | User |
| A.S.T.R.I.D. S.A. | BELGIUM | Network Operator |
| ABB AS | NORWAY | Manufacturer |
| Abbott | SWEDEN | Manufacturer |
| AC Camerfirma SA | SPAIN | Observer |
| ACB Europe Ltd | UNITED KINGDOM | Service Provider |
| Accanto Systems Oy | FINLAND | Manufacturer |
| AccelerComm Ltd | UNITED KINGDOM | Consultancy Company/Partnership |
| ACCURIS Ltd | IRELAND | Manufacturer |
| Acer Incorporated | TAIWAN, PROVINCE OF CHINA | Manufacturer |
| Actility SA | FRANCE | Manufacturer |
| adare GmbH | GERMANY | Consultancy Company/Partnership |
| ADDS | GERMANY | User |
| Adobe Systems | IRELAND | Other |
| ADTRAN GmbH | GERMANY | Manufacturer |
| ADVA Optical Networking SE | GERMANY | Manufacturer |
| ADVENICA AB | SWEDEN | Manufacturer |
| AER | SPAIN | User |
| Aeroflex/VIAVI | UNITED KINGDOM | Manufacturer |
| Affirmed Networks Inc. | UNITED STATES | Manufacturer |
| AFNOR | FRANCE | Other |
| AFUTT | FRANCE | User |
| Agency for Electronic Comm. | FYROM | Administration |
| AgID | ITALY | Other Governmental Body |
| Agoria ICT | BELGIUM | Manufacturer |
| AIM EUROPE | BELGIUM | Other |
| Airbus DS SLC | FRANCE | Manufacturer |
| Airwave Solutions Limited | UNITED KINGDOM | Network Operator |
| AIT | AUSTRIA | Research Body (Public) |
| ALASTRIA | SPAIN | User |
| Alstom Transport SA | FRANCE | Manufacturer |
| Altan Redes | MEXICO | Network Operator |
| Altiostar | UNITED KINGDOM | Manufacturer |
| Amazon | UNITED STATES | Service Provider |
| Amdocs Software Systems Ltd | IRELAND | Service Provider |
| Amimon Ltd | ISRAEL | Manufacturer |
| AMK WFB | GERMANY | Other Governmental Body |
| Analog Devices International | IRELAND | Manufacturer |
| ANDORRA TELECOM S.A.U. | ANDORRA | Network Operator |
| Andrew Wireless Systems GmbH | GERMANY | Manufacturer |
| ANEC | BELGIUM | User |
| Anemone Technology | DENMARK | Consultancy Company/Partnership |
| ANITEC | ITALY | Manufacturer |
| ANRITSU LTD | UNITED KINGDOM | Manufacturer |
| Apple (UK) Limited | UNITED KINGDOM | Manufacturer |
| Apple AB | SWEDEN | Manufacturer |
| Apple Benelux B.V. | NETHERLANDS | Manufacturer |
| Apple Europe Limited | UNITED KINGDOM | Manufacturer |
| Apple France | FRANCE | Manufacturer |
| Apple Gesellschaft m.b.H. | AUSTRIA | Manufacturer |
| Apple GmbH | GERMANY | Manufacturer |
| Apple Hungary Kft. | HUNGARY | Manufacturer |
| Apple Italia S.R.L. | ITALY | Manufacturer |
| Apple Poland Sp. z.o.o. | POLAND | Manufacturer |
| Apple Portugal | PORTUGAL | Manufacturer |
| Apple Switzerland AG | SWITZERLAND | Manufacturer |
| Approach Infinity | CANADA | Consultancy Company/Partnership |
| APSI | KOREA (REPUBLIC OF) | Manufacturer |
| APWPT | GERMANY | User |
| AQSACOM S.A.S. | FRANCE | Manufacturer |
| Araxxe SAS | FRANCE | Network Operator |
| Arcep | FRANCE | Other Governmental Body |
| AREA Spa | ITALY | Manufacturer |
| ArgoNET GmbH | AUSTRIA | Network Operator |
| Aria Networks | UNITED KINGDOM | Other |
| ARKEP | KOSOVO | Other |
| ARRIS | UNITED STATES | Manufacturer |
| Aruba PEC | ITALY | Service Provider |
| ASELSAN | TURKEY | Manufacturer |
| Asia Pacific Telecom co. Ltd | TAIWAN, PROVINCE OF CHINA | Network Operator |
| AsiaInfo Technologies Inc | CHINA | Service Provider |
| Association eG4U | FRANCE | User |
| ASTRI | CHINA | Research Body (Public) |
| asut | SWITZERLAND | Other |
| AT&T GNS Belgium SPRL | BELGIUM | Network Operator |
| ATIS Systems GmbH | GERMANY | Manufacturer |
| Attorney-General's Department | AUSTRALIA | Other Governmental Body |
| Audi | GERMANY | Manufacturer |
| Austrian Standards Institute | AUSTRIA | Other |
| AUTOCRUISE S.A.S. | FRANCE | Manufacturer |
| Autotalks Ltd | ISRAEL | Manufacturer |
| Avanti Communications Ltd | UNITED KINGDOM | Service Provider |
| Aveillant Ltd | UNITED KINGDOM | Manufacturer |
| Aviat Networks | UNITED KINGDOM | Manufacturer |
| AVM Berlin | GERMANY | Manufacturer |
| Azimuth | UNITED STATES | Manufacturer |
| BAE Systems AI Ltd | UNITED KINGDOM | Manufacturer |
| BANE NOR SF | NORWAY | Other Governmental Body |
| BankID Norge AS | NORWAY | Other |
| Bayerisches Landeskriminalamt | GERMANY | Administration |
| BBC | UNITED KINGDOM | Research Body (Private) |
| B-Com | FRANCE | Research Body (Private) |
| BDBOS | GERMANY | Other Governmental Body |
| Belgian Mobile ID SA/NV | BELGIUM | Service Provider |
| Bell Mobility | CANADA | Service Provider |
| beyerdynamic GmbH & Co. KG | GERMANY | Manufacturer |
| BfV | GERMANY | Administration |
| BH Telecom | BOSNIA AND HERZEGOVINA | Network Operator |
| BIOTRONIK SE & Co. KG | GERMANY | Manufacturer |
| BIPT | BELGIUM | Administration |
| Bishop Communications Ltd | UNITED KINGDOM | Consultancy Company/Partnership |
| Bittium Wireless Ltd. | FINLAND | Manufacturer |
| BK Services | SWEDEN | Consultancy Company/Partnership |
| BKA | GERMANY | Administration |
| BlackBerry UK Limited | UNITED KINGDOM | Manufacturer |
| Blekinge Tekniska Högskola | SWEDEN | University |
| Bliksrud Telecom | NORWAY | Consultancy Company/Partnership |
| Bluetest AB | SWEDEN | Other |
| Bluetooth SIG Inc. | UNITED STATES | Manufacturer |
| BMWi | GERMANY | Administration |
| BNAE | FRANCE | Other |
| BOCRA | BOTSWANA | Other Governmental Body |
| BOEING INTERNATIONAL CORP. | UNITED KINGDOM | Manufacturer |
| Bolloré Telecom S.A.S | FRANCE | Network Operator |
| Bolt & Yurdal Consulting ApS | DENMARK | Consultancy Company/Partnership |
| Boston Scientific Corp. | BELGIUM | Manufacturer |
| BOUYGUES Telecom | FRANCE | Network Operator |
| BroadBit | SLOVAKIA | Research Body (Private) |
| Broadcast Networks Europe | BELGIUM | Other |
| BROADCOM CORPORATION | UNITED STATES | Manufacturer |
| BSI | UNITED KINGDOM | Other |
| BT plc | UNITED KINGDOM | Network Operator |
| BTI | CANADA | Observer |
| BTL Inc. | CHINA | Other |
| Bull SAS | FRANCE | Manufacturer |
| Bundesdruckerei GmbH | GERMANY | Other Governmental Body |
| Bureau Veritas | TAIWAN, PROVINCE OF CHINA | Service Provider |
| Cable Europe | BELGIUM | User |
| CableLabs | UNITED STATES | Research Body (Private) |
| Cadence Design Systems Inc. | UNITED STATES | Other |
| Cadzow Communications | UNITED KINGDOM | Consultancy Company/Partnership |
| CAICT | CHINA | Research Body (Public) |
| Cambium Networks Limited | UNITED KINGDOM | Manufacturer |
| Cambridge Blockchain SAS | FRANCE | Consultancy Company/Partnership |
| CAMBRIDGE CONSULTANTS LTD | UNITED KINGDOM | Consultancy Company/Partnership |
| CANON Research Centre France | FRANCE | Research Body (Private) |
| Canonical Group Limited | UNITED KINGDOM | Manufacturer |
| CAOC | SPAIN | Research Body (Public) |
| Casa Systems Inc. | UNITED STATES | Manufacturer |
| Catapult | UNITED KINGDOM | Research Body (Public) |
| CATT | CHINA | Manufacturer |
| CCww | UNITED KINGDOM | Consultancy Company/Partnership |
| C-DOT | INDIA | Research Body (Public) |
| CEA-LETI | FRANCE | Research Body (Public) |
| CECED | BELGIUM | Other |
| Cellnex | SPAIN | Network Operator |
| CENX Inc. | UNITED STATES | Manufacturer |
| CEPT | DENMARK | Observer |
| Ceragon Networks AS | NORWAY | Manufacturer |
| Certicar S.L. | SPAIN | Other |
| certSIGN | ROMANIA | Research Body (Private) |
| CETECOM GmbH | GERMANY | Service Provider |
| CGC Inc. | TAIWAN, PROVINCE OF CHINA | Service Provider |
| China Telecommunications | CHINA | Network Operator |
| CHTTL | TAIWAN, PROVINCE OF CHINA | Service Provider |
| Cinderella ApS | DENMARK | Manufacturer |
| CIS | UNITED STATES | User |
| Cisco Systems Belgium | BELGIUM | Manufacturer |
| Cisco Systems France | FRANCE | Manufacturer |
| CJSC Norsi-Trans | RUSSIAN FEDERATION | Service Provider |
| CKH IOD UK LIMITED | UNITED KINGDOM | Network Operator |
| Climate Associates Limited | UNITED KINGDOM | Consultancy Company/Partnership |
| Club PSCo | FRANCE | User |
| CMC | MALAYSIA | Administration |
| CML Microcircuits | UNITED KINGDOM | Manufacturer |
| CNES | FRANCE | Research Body (Public) |
| CNH Industrial | BELGIUM | Manufacturer |
| CNIT | ITALY | Research Body (Public) |
| CNRS | FRANCE | Research Body (Public) |
| Cohda Wireless Pty Ltd | AUSTRALIA | Manufacturer |
| CommLedge | FRANCE | Consultancy Company/Partnership |
| CommScope | BELGIUM | Manufacturer |
| CommScope Technologies AG | UNITED KINGDOM | Manufacturer |
| Comprion GmbH | GERMANY | Manufacturer |
| conexx | SWITZERLAND | Consultancy Company/Partnership |
| Connective | BELGIUM | Service Provider |
| Continental Automotive GmbH | GERMANY | Manufacturer |
| Conversant Wireless | LUXEMBOURG | Other |
| Convida Wireless | UNITED STATES | Other |
| Copenhagen Fire Brigade | DENMARK | User |
| CORNING | UNITED STATES | Other |
| COSMOTE S.A. | GREECE | Network Operator |
| CPTRA | ESTONIA | Administration |
| CRC | BULGARIA | Administration |
| Crypto International AB | SWEDEN | Manufacturer |
| Cryptolog International | FRANCE | Service Provider |
| CSEM | SWITZERLAND | Research Body (Private) |
| CTC | BELGIUM | Research Body (Private) |
| CTC advanced GmbH | GERMANY | Service Provider |
| CTT | CHINA | Administration |
| CTTC | SPAIN | Research Body (Public) |
| Cypress Semiconductor Corp. | IRELAND | Manufacturer |
| CYS | CYPRUS | Other Governmental Body |
| Czech Telecommunication Office | CZECH REPUBLIC | Administration |
| DAC-UPC | SPAIN | University |
| Daegu University | KOREA (REPUBLIC OF) | University |
| Daimler AG | GERMANY | User |
| Dansk Standard | DENMARK | Administration |
| DARS TELECOM S.L. | SPAIN | Service Provider |
| datafusion Systems GmbH | GERMANY | Manufacturer |
| DCMS | UNITED KINGDOM | Administration |
| DDUN | MONACO | Other Governmental Body |
| DecaWave Ltd | IRELAND | Manufacturer |
| DEKRA | SPAIN | Consultancy Company/Partnership |
| DEKRA EXAM GmbH | GERMANY | Other |
| DENSO AUTOMOTIVE | GERMANY | User |
| Department of Communications | IRELAND | Administration |
| Deutsche Bahn AG | GERMANY | User |
| Deutsche Telekom AG | GERMANY | Network Operator |
| Deveryware | FRANCE | Service Provider |
| DFS Deutsche Flugsicherung | GERMANY | Service Provider |
| Dialog Semiconductor | NETHERLANDS | Manufacturer |
| Diehl Metering GmbH | GERMANY | Manufacturer |
| Digital Jersey | UNITED KINGDOM | Other Governmental Body |
| Digital TV Group | UNITED KINGDOM | User |
| DKE | GERMANY | Other |
| DLR | GERMANY | Research Body (Public) |
| DOCAPOST DPS | FRANCE | Service Provider |
| DOCOMO Communications Lab. | GERMANY | Research Body (Private) |
| DocuSign | UNITED KINGDOM | Service Provider |
| Dolby Laboratories Inc. | UNITED KINGDOM | Manufacturer |
| Doshisha University | JAPAN | University |
| DPS | ALBANIA | Administration |
| DSPG Edinburgh Ltd | UNITED KINGDOM | Manufacturer |
| DTS Licensing Limited | IRELAND | Other |
| DTU | DENMARK | University |
| EANTC AG | GERMANY | Consultancy Company/Partnership |
| EBU | SWITZERLAND | User |
| ECBF | FRANCE | User |
| Ecma International | SWITZERLAND | Observer |
| ECO | DENMARK | Administration |
| ECOS | BELGIUM | User |
| EDF Recherche et Développement | FRANCE | Research Body (Private) |
| EENA | BELGIUM | User |
| EGM | FRANCE | Service Provider |
| EGMF | BELGIUM | Manufacturer |
| EKIP | MONTENEGRO | Administration |
| ElectronicCommunicationsOffice | LATVIA | Administration |
| Element Materials Technology | UNITED KINGDOM | Service Provider |
| Eltek | NORWAY | Manufacturer |
| Emerson Process Mgt Limited | UNITED KINGDOM | Manufacturer |
| EMITE | SPAIN | Other |
| Empirix Inc. | ITALY | Service Provider |
| Endress + Hauser GmbH & Co. KG | GERMANY | Manufacturer |
| ENENSYS | FRANCE | Manufacturer |
| ENICONS | SPAIN | Service Provider |
| ENX | FRANCE | Other |
| ERA | FRANCE | Other Governmental Body |
| Ericsson España S.A. | SPAIN | Manufacturer |
| Ericsson France S.A.S | FRANCE | Manufacturer |
| Ericsson GmbH, Eurolab | GERMANY | Manufacturer |
| Ericsson Hungary Ltd | HUNGARY | Manufacturer |
| Ericsson Limited | UNITED KINGDOM | Manufacturer |
| Ericsson LM | SWEDEN | Manufacturer |
| Ericsson Telecomunicazioni SpA | ITALY | Manufacturer |
| ESA | NETHERLANDS | Service Provider |
| ETELM | FRANCE | Manufacturer |
| ETISALAT | UNITED ARAB EMIRATES | Network Operator |
| ETRI | KOREA (REPUBLIC OF) | Research Body (Public) |
| ETS-Lindgren Europe | FINLAND | Manufacturer |
| ETUC | BELGIUM | User |
| EUCOMREG | BELGIUM | Consultancy Company/Partnership |
| EURECOM | FRANCE | Research Body (Public) |
| EURL Filatov DV | FRANCE | Consultancy Company/Partnership |
| EUROCONTROL | BELGIUM | User |
| European Disability Forum | BELGIUM | User |
| European GPR Association | UNITED KINGDOM | Other |
| European Patent Organisation | NETHERLANDS | User |
| Eurosmart AISBL | BELGIUM | Manufacturer |
| EUTC | BELGIUM | Other |
| Eutelsat S.A. | FRANCE | Network Operator |
| EVE Compliancy Solutions | NETHERLANDS | Manufacturer |
| eWitness S.A. | LUXEMBOURG | Service Provider |
| Expway | FRANCE | Service Provider |
| Fabasoft AG | AUSTRIA | Service Provider |
| Facebook | IRELAND | Service Provider |
| Facultad de Informatica | SPAIN | University |
| Fairspectrum Oy | FINLAND | Service Provider |
| Fastweb S.p.A. | ITALY | Network Operator |
| FAU | GERMANY | University |
| FBConsulting S.A.R.L. | LUXEMBOURG | Consultancy Company/Partnership |
| FBK | ITALY | Research Body (Public) |
| FED. MINISTRY FOR TRANSPORT | AUSTRIA | Administration |
| FEIG ELECTRONIC GmbH | GERMANY | Manufacturer |
| FH Campus Wien University | AUSTRIA | University |
| Fiware Foundation | GERMANY | Other |
| FNTC | FRANCE | Other |
| Focus Infocom | GERMANY | Manufacturer |
| FONDAZIONE LINKS | ITALY | Research Body (Private) |
| FORCE Technology | DENMARK | Research Body (Public) |
| Fortinet | FRANCE | Consultancy Company/Partnership |
| France Brevets | FRANCE | Consultancy Company/Partnership |
| Fraport AG | GERMANY | Other |
| Fraunhofer | GERMANY | Research Body (Public) |
| Fraunhofer AISEC | GERMANY | Research Body (Public) |
| Fraunhofer ESK | GERMANY | Research Body (Public) |
| Fraunhofer FOKUS | GERMANY | Research Body (Public) |
| Fraunhofer HHI | GERMANY | Research Body (Public) |
| Fraunhofer IIS | GERMANY | Research Body (Public) |
| Fraunhofer IMW | GERMANY | Research Body (Public) |
| Fraunhofer IVI | GERMANY | Research Body (Public) |
| Fraunhofer SIT | GERMANY | Research Body (Public) |
| Frequentis | AUSTRIA | Manufacturer |
| FSCOM | FRANCE | Consultancy Company/Partnership |
| FUJITSU Laboratories of Europe | UNITED KINGDOM | Manufacturer |
| Fujitsu Limited | JAPAN | Manufacturer |
| Fundacio i2CAT | SPAIN | Research Body (Public) |
| Funkwerk Systems GmbH | GERMANY | Manufacturer |
| G+D MS | GERMANY | Manufacturer |
| G²C | FRANCE | Consultancy Company/Partnership |
| Gemalto N.V. | NETHERLANDS | Manufacturer |
| GENBAND Ireland Ltd | IRELAND | Manufacturer |
| Geyser-Telecom Ltd. | RUSSIAN FEDERATION | Research Body (Private) |
| GIE ANEC | LUXEMBOURG | User |
| Gigaset Communications GmbH | GERMANY | Manufacturer |
| Gilat | ISRAEL | Manufacturer |
| GLOBALSTAR Inc. | UNITED STATES | Service Provider |
| GNCC | GEORGIA | Administration |
| Google Ireland Limited | IRELAND | Manufacturer |
| GosNIIAS | RUSSIAN FEDERATION | Research Body (Public) |
| Governikus GmbH & Co. KG | GERMANY | Service Provider |
| GovStrat | BELGIUM | Consultancy Company/Partnership |
| GPSIA | UNITED STATES | Manufacturer |
| Great Circle Design | UNITED KINGDOM | Consultancy Company/Partnership |
| Group 2000 | NETHERLANDS | Manufacturer |
| GS1 | BELGIUM | User |
| GTRC | UNITED STATES | University |
| HA/AG | GERMANY | Manufacturer |
| HAGER GROUP | FRANCE | Manufacturer |
| Halmstad University | SWEDEN | University |
| Hanyang University | KOREA (REPUBLIC OF) | University |
| HCL Technologies limited | INDIA | Consultancy Company/Partnership |
| HEAD acoustics GmbH | GERMANY | Manufacturer |
| Hella | GERMANY | Manufacturer |
| HEPTA 7291 | UNITED STATES | Consultancy Company/Partnership |
| HERON | ISRAEL | Research Body (Public) |
| Hewlett-Packard Enterprise | FRANCE | Manufacturer |
| Hillebrand GmbH | GERMANY | Consultancy Company/Partnership |
| HILTI AG | LIECHTENSTEIN | Manufacturer |
| HISPASAT SA | SPAIN | Network Operator |
| Hitachi Europe Ltd. | UNITED KINGDOM | Manufacturer |
| hl2 | FRANCE | Manufacturer |
| HOME OFFICE | UNITED KINGDOM | Administration |
| Honeywell Enraf BV | NETHERLANDS | Manufacturer |
| HTW Saarland | GERMANY | University |
| HUAWEI TECH. GmbH | GERMANY | Manufacturer |
| Huawei Tech.(UK) Co., Ltd | UNITED KINGDOM | Manufacturer |
| Huawei Technologies Co. Ltd. | CHINA | Manufacturer |
| Huawei Technologies France | FRANCE | Manufacturer |
| Huawei Technologies R&D UK | UNITED KINGDOM | Manufacturer |
| Huawei Technologies Sweden AB | SWEDEN | Research Body (Private) |
| HUGHES Network Systems Ltd | UNITED KINGDOM | Network Operator |
| Husqvarna AB | SWEDEN | Manufacturer |
| Hydeco | UNITED STATES | Manufacturer |
| Hyundai Motor Europe | GERMANY | Manufacturer |
| IAV GmbH | GERMANY | User |
| IBIT Ambrosini | GERMANY | Consultancy Company/Partnership |
| IBM Europe | GERMANY | Manufacturer |
| ICOM (C.E.P.) FRANCE | FRANCE | Manufacturer |
| iconectiv | UNITED STATES | Other |
| ICS | UNITED KINGDOM | University |
| ICTA | TURKEY | Observer |
| ID Quantique | SWITZERLAND | Manufacturer |
| Idaho National Laboratory | UNITED STATES | Research Body (Public) |
| IDEMIA | FRANCE | Manufacturer |
| IDnomic | FRANCE | Service Provider |
| IDSGeo | ITALY | Manufacturer |
| ifak | GERMANY | Research Body (Private) |
| IHLMA | UNITED KINGDOM | User |
| III | TAIWAN, PROVINCE OF CHINA | Research Body (Public) |
| iLabs Technologies | NETHERLANDS | Consultancy Company/Partnership |
| ILNAS | LUXEMBOURG | Administration |
| IMEC | BELGIUM | Research Body (Public) |
| INFINEON TECHNOLOGIES | GERMANY | Manufacturer |
| InfoCert s.p.a. | ITALY | Service Provider |
| Infovista SAS | FRANCE | Other |
| Infrabel - ICT | BELGIUM | Service Provider |
| Inmarsat | UNITED KINGDOM | Network Operator |
| INRIA | FRANCE | Research Body (Public) |
| INRIM | ITALY | Research Body (Public) |
| Insta Elektro GmbH | GERMANY | Manufacturer |
| Institut für Informatik | GERMANY | University |
| Institut Mines-Telecom | FRANCE | Research Body (Public) |
| Institute for standardization | BOSNIA AND HERZEGOVINA | Administration |
| Institute VEDECOM | FRANCE | Research Body (Public) |
| Intel Belgium SA/NV | BELGIUM | Manufacturer |
| Intel Corporation (UK) Ltd | UNITED KINGDOM | Manufacturer |
| Intel Corporation Italia SpA | ITALY | Manufacturer |
| Intel Corporation SAS | FRANCE | Manufacturer |
| Intel Deutschland GmbH | GERMANY | Manufacturer |
| Intel Finland Oy | FINLAND | Manufacturer |
| Intel Ireland | IRELAND | Manufacturer |
| Intel Russia A/O | RUSSIAN FEDERATION | Manufacturer |
| Intel Sweden AB | SWEDEN | Manufacturer |
| Intel Technology Poland SP Zoo | POLAND | Manufacturer |
| INTELLINIUM | FRANCE | Manufacturer |
| InterDigital Belgium. LLC | BELGIUM | Manufacturer |
| InterDigital CE Intermediate | FRANCE | Manufacturer |
| InterDigital Germany GmbH | GERMANY | Manufacturer |
| InterDigital, Europe, Ltd. | UNITED KINGDOM | Manufacturer |
| InterDigital, Inc. | UNITED STATES | Manufacturer |
| International Amateur Radio | SWITZERLAND | User |
| Intertek | UNITED KINGDOM | Service Provider |
| IOTECC GmbH | GERMANY | Consultancy Company/Partnership |
| IP*SEVA | GERMANY | Service Provider |
| ip.access Ltd. | UNITED KINGDOM | Manufacturer |
| IPCom GmbH & Co.KG | GERMANY | Research Body (Private) |
| Irdeto BV | NETHERLANDS | Manufacturer |
| IRT | GERMANY | Research Body (Public) |
| IRT SystemX | FRANCE | Research Body (Private) |
| ISAD e.V | GERMANY | User |
| ISARA | CANADA | Manufacturer |
| Iskratel d.o.o. Ltd | SLOVENIA | Manufacturer |
| ISM | MOLDOVA, REPUBLIC OF | Observer |
| ISO/IEC JTC 1 Secretariat | UNITED STATES | Observer |
| Ista International GmbH | GERMANY | Manufacturer |
| ITALTEL SpA | ITALY | Manufacturer |
| itk | SWITZERLAND | Research Body (Private) |
| ITM | HUNGARY | Administration |
| ITRI | TAIWAN, PROVINCE OF CHINA | Research Body (Public) |
| ITRON SAS | FRANCE | Research Body (Private) |
| iTrust Ethics Ltd | IRELAND | Consultancy Company/Partnership |
| ITS | SWEDEN | Other |
| ITT RAEN | RUSSIAN FEDERATION | Research Body (Public) |
| Izenpe S.A. | SPAIN | Research Body (Public) |
| Japan Patent Office | JAPAN | User |
| JNSA | JAPAN | Research Body (Public) |
| John Deere GmbH & Co. KG | GERMANY | Manufacturer |
| JOTRON a.s. | NORWAY | Manufacturer |
| Juniper Networks | UNITED STATES | Manufacturer |
| JVCKENWOOD | NETHERLANDS | Manufacturer |
| Kamstrup | DENMARK | Manufacturer |
| Kapsch CarrierCom France S.A.S | FRANCE | Manufacturer |
| Kapsch TrafficCom AB | SWEDEN | Manufacturer |
| Kapsch TrafficCom AG | AUSTRIA | Manufacturer |
| KAT | FRANCE | Consultancy Company/Partnership |
| KATHREIN SE | GERMANY | Manufacturer |
| KDPOF S.L | SPAIN | Manufacturer |
| KETI | KOREA (REPUBLIC OF) | Research Body (Public) |
| Keysight Technologies UK Ltd | UNITED KINGDOM | Manufacturer |
| King's College London (KCL) | UNITED KINGDOM | University |
| KPN N.V. | NETHERLANDS | Network Operator |
| KROHNE Messtechnik GmbH | GERMANY | Manufacturer |
| Kymeta Corporation | UNITED STATES | Manufacturer |
| L.M. Ericsson Limited | IRELAND | Manufacturer |
| Landis+Gyr AG | SWITZERLAND | Manufacturer |
| Lantiq | GERMANY | Manufacturer |
| LCA | LESOTHO | Administration |
| LEA - Networks | FRANCE | Manufacturer |
| Lecit Consulting s.r.l. | ITALY | Consultancy Company/Partnership |
| LEGRAND FRANCE | FRANCE | Manufacturer |
| Leonardo SpA | ITALY | Manufacturer |
| LG Electronics Deutschland | GERMANY | Manufacturer |
| LG Electronics Finland | FINLAND | Manufacturer |
| LG Electronics France | FRANCE | Research Body (Private) |
| LG Electronics Polska | POLAND | Manufacturer |
| LG Electronics UK | UNITED KINGDOM | Manufacturer |
| LGAI Technological Center SA | SPAIN | Service Provider |
| Ligado Networks | UNITED STATES | Network Operator |
| Lithuanian Standards Board | LITHUANIA | Administration |
| LKA Niedersachsen | GERMANY | Administration |
| LKA NRW | GERMANY | Administration |
| Logalty | SPAIN | Service Provider |
| Low Power Radio Association | UNITED KINGDOM | Service Provider |
| LSTI SAS | FRANCE | Service Provider |
| Lufthansa Systems GmbH & Co KG | GERMANY | Service Provider |
| Luxtrust | LUXEMBOURG | Service Provider |
| Lyngsoe Systems Ltd | CANADA | Manufacturer |
| Magna Electronics Europe GmbH | GERMANY | Manufacturer |
| Malta Communications Authority | MALTA | Administration |
| Mangrovia Solutions | ITALY | Service Provider |
| Marben Products | FRANCE | Other |
| Marine Rescue Technologies ltd | UNITED KINGDOM | Manufacturer |
| MARITIME AND COASTGUARD AGENCY | UNITED KINGDOM | Administration |
| Marquardt GmbH | GERMANY | Manufacturer |
| Matrixx | UNITED STATES | Manufacturer |
| Mavenir | UNITED STATES | Manufacturer |
| MCCAA | MALTA | Administration |
| MCIT | INDONESIA | Administration |
| MDH | SWEDEN | University |
| MeadowCom | FRANCE | Consultancy Company/Partnership |
| MediaTek Inc. | TAIWAN, PROVINCE OF CHINA | Manufacturer |
| MEDTRONIC BAKKEN RESEARCH BV | NETHERLANDS | Manufacturer |
| Mesaqin.com s.r.o (Ltd.) | CZECH REPUBLIC | Consultancy Company/Partnership |
| MICROCHIP TECHNOLOGY SARL | FRANCE | Service Provider |
| Microsec Ltd | HUNGARY | Service Provider |
| Microsoft Europe SARL | FRANCE | Manufacturer |
| Microsoft Ireland | IRELAND | Manufacturer |
| Microsoft Ltd | UNITED KINGDOM | Manufacturer |
| Microsoft Switzerland | SWITZERLAND | Manufacturer |
| MINECO | SPAIN | Administration |
| MINISTERE DE L'INTERIEUR | FRANCE | Administration |
| Ministère Economie et Finances | FRANCE | Administration |
| Ministero Sviluppo Economico | ITALY | Administration |
| Ministry of Digital Affairs | POLAND | Administration |
| Ministry of Digital Policy | GREECE | Administration |
| Ministry of Economic Affairs | NETHERLANDS | Administration |
| Ministry of Transport and Cons | SLOVAKIA | Administration |
| MITRE Corporation | UNITED STATES | Research Body (Public) |
| Mitsubishi Electric RCE | FRANCE | Manufacturer |
| MM Interwork | INDIA | Manufacturer |
| MMATI | CROATIA | Administration |
| Motorola Mobility España SA | SPAIN | Manufacturer |
| Motorola Mobility France S.A.S | FRANCE | Manufacturer |
| Motorola Mobility Germany GmbH | GERMANY | Manufacturer |
| Motorola Mobility UK Ltd. | UNITED KINGDOM | Manufacturer |
| Motorola Solutions Danmark A/S | DENMARK | Manufacturer |
| Motorola Solutions Germany | GERMANY | Manufacturer |
| Motorola Solutions Poland | POLAND | Manufacturer |
| Motorola Solutions UK Ltd. | UNITED KINGDOM | Manufacturer |
| MSB | SWEDEN | Other Governmental Body |
| MTI | TAIWAN, PROVINCE OF CHINA | Manufacturer |
| MTN Dubai LLC | UNITED ARAB EMIRATES | Network Operator |
| Multi-Tech Systems, Inc | UNITED STATES | Manufacturer |
| MVG Industries | FRANCE | Manufacturer |
| Nagravision S.A. | SWITZERLAND | Other |
| National Chiao Tung University | TAIWAN, PROVINCE OF CHINA | University |
| National Institute of Telecom. | POLAND | Research Body (Public) |
| National Instruments Corp. | UNITED STATES | Manufacturer |
| National Taiwan University | TAIWAN, PROVINCE OF CHINA | University |
| National Technical Assistance | UNITED KINGDOM | Other Governmental Body |
| NATS | UNITED KINGDOM | Service Provider |
| NAVTECH RADAR | UNITED KINGDOM | Manufacturer |
| nbn co Limited | AUSTRALIA | Network Operator |
| NCIS | NORWAY | Other Governmental Body |
| NCSC | UNITED KINGDOM | Administration |
| NCSR Demokritos | GREECE | Research Body (Public) |
| NDCA | TUNISIA | Observer |
| NDRE | SWEDEN | Other Governmental Body |
| NEC Corporation | JAPAN | Manufacturer |
| NEC Europe Ltd | UNITED KINGDOM | Manufacturer |
| NEC Telecom MODUS Ltd. | UNITED KINGDOM | Manufacturer |
| NEDAP | NETHERLANDS | Manufacturer |
| NET CHECK GmbH | GERMANY | Service Provider |
| NET INSIGHT AB | SWEDEN | Manufacturer |
| Netas | TURKEY | Manufacturer |
| NetComm Wireless Limited | AUSTRALIA | Manufacturer |
| NETO | FRANCE | Consultancy Company/Partnership |
| Netscout Systems Inc. | UNITED STATES | Manufacturer |
| Network Access Associates Ltd | UNITED KINGDOM | Service Provider |
| Networked Energy Services Corp | AUSTRIA | Manufacturer |
| Newen Srl | ITALY | Manufacturer |
| Newtec Cy NV | BELGIUM | Other |
| Nexign | RUSSIAN FEDERATION | Manufacturer |
| NFR | UNITED STATES | Manufacturer |
| ng4T | GERMANY | Manufacturer |
| NICT | JAPAN | Research Body (Public) |
| NIIR | RUSSIAN FEDERATION | Service Provider |
| Nimbus Technologieberatung | GERMANY | Consultancy Company/Partnership |
| Nkom | NORWAY | Administration |
| NMHH | HUNGARY | Administration |
| Nok9 AB | SWEDEN | Manufacturer |
| Nokia Belgium | BELGIUM | Manufacturer |
| Nokia Corporation | FINLAND | Manufacturer |
| Nokia France | FRANCE | Manufacturer |
| Nokia Germany | GERMANY | Manufacturer |
| Nokia Uk | UNITED KINGDOM | Manufacturer |
| Nomor Research GmbH | GERMANY | Consultancy Company/Partnership |
| Nordic Semiconductor ASA | NORWAY | Manufacturer |
| Nordic Telecom Systems a.s. | CZECH REPUBLIC | Network Operator |
| NORDSYS GmbH | GERMANY | Manufacturer |
| NOVAMINT | UNITED KINGDOM | Other |
| Novelda AS | NORWAY | Manufacturer |
| Nowina Solutions | LUXEMBOURG | Consultancy Company/Partnership |
| NPL | UNITED KINGDOM | Other Governmental Body |
| NSAI | IRELAND | Other Governmental Body |
| NTH S.R.L. | ITALY | Manufacturer |
| NTT corporation | JAPAN | Network Operator |
| NXP Semiconductors Netherlands | NETHERLANDS | Manufacturer |
| ÖBB-Infrastruktur AG | AUSTRIA | Service Provider |
| Ofcom (CH) | SWITZERLAND | Administration |
| Ofcom (U.K.) | UNITED KINGDOM | Administration |
| Ogero Telecom | LEBANON | Network Operator |
| OIC | SOUTH AFRICA | Other Governmental Body |
| OnBoard Security | UNITED STATES | Consultancy Company/Partnership |
| one2many B.V. | NETHERLANDS | Manufacturer |
| OnStar Europe | UNITED KINGDOM | Manufacturer |
| OOREDOO | QATAR | Service Provider |
| Open Source Initiative | UNITED STATES | User |
| Openet Telecom | IRELAND | Service Provider |
| OPTICOM GmbH | GERMANY | Manufacturer |
| Oracle Corporation | UNITED STATES | Service Provider |
| Orange | FRANCE | Network Operator |
| Orange Romania | ROMANIA | Network Operator |
| Orange Spain | SPAIN | Network Operator |
| Orange UK | UNITED KINGDOM | Network Operator |
| OSGP Alliance | NETHERLANDS | Other |
| OTD | UNITED STATES | Other Governmental Body |
| OTT Hydromet GmbH | GERMANY | Manufacturer |
| OU Elvior | ESTONIA | Service Provider |
| OVE | AUSTRIA | Other |
| Oy LM Ericsson AB | FINLAND | Manufacturer |
| P.I. WORKS | TURKEY | Service Provider |
| P3 communications GmbH | GERMANY | Consultancy Company/Partnership |
| PA Consulting Services Ltd | UNITED KINGDOM | Service Provider |
| PANASONIC R&D Center Germany | GERMANY | Manufacturer |
| PARK AIR SYSTEMS LIMITED | UNITED KINGDOM | Manufacturer |
| PCCW Global B.V. | FRANCE | Service Provider |
| PCS | UNITED KINGDOM | Consultancy Company/Partnership |
| Peritum | UNITED STATES | Consultancy Company/Partnership |
| Philips International B.V. | NETHERLANDS | Manufacturer |
| Phoenix Contact GmbH & Co. KG | GERMANY | Manufacturer |
| Phoenix Testlab GmbH | GERMANY | Service Provider |
| Phonak Communications AG | SWITZERLAND | Manufacturer |
| PIDS | NETHERLANDS | Other Governmental Body |
| Pirelli Tyre SpA | ITALY | Manufacturer |
| PNO | GERMANY | Other |
| Polaran | TURKEY | Research Body (Private) |
| Polisen | SWEDEN | Other Governmental Body |
| Polizia di Stato | ITALY | Administration |
| Post- and Telecom Admin. | ICELAND | Administration |
| POST Luxembourg | LUXEMBOURG | Network Operator |
| Prisma Telecom Testing srl | ITALY | Manufacturer |
| ProRail | NETHERLANDS | Manufacturer |
| Proximus Plc | BELGIUM | Network Operator |
| PT PORTUGAL SGPS SA | PORTUGAL | Network Operator |
| PTS | SWEDEN | Administration |
| Public Safety Canada | CANADA | Other Governmental Body |
| Q-Free ASA | NORWAY | Manufacturer |
| QIAC | CHINA | User |
| Qorvo | UNITED STATES | Manufacturer |
| Qorvo Utrecht B.V. | NETHERLANDS | Manufacturer |
| Qualcomm Austria RFFE GmbH | AUSTRIA | Manufacturer |
| Qualcomm CDMA Technologies | GERMANY | Manufacturer |
| Qualcomm communications-France | FRANCE | Manufacturer |
| QUALCOMM Europe Inc. - Italy | ITALY | Manufacturer |
| QUALCOMM Europe Inc. - Spain | SPAIN | Manufacturer |
| Qualcomm Finland RFFE Oy | FINLAND | Manufacturer |
| Qualcomm Tech. Netherlands B.V | NETHERLANDS | Manufacturer |
| Qualcomm UK Ltd | UNITED KINGDOM | Manufacturer |
| Qualcomm Wireless GmbH | SWITZERLAND | Manufacturer |
| Queens University Belfast | UNITED KINGDOM | University |
| Quixoticity | UNITED KINGDOM | Consultancy Company/Partnership |
| Qunion | KOREA (REPUBLIC OF) | Research Body (Public) |
| Quortus Limited | UNITED KINGDOM | Manufacturer |
| Radboud University | NETHERLANDS | University |
| RADIODATA GmbH | GERMANY | Manufacturer |
| RadiSys | CANADA | Manufacturer |
| RATEL | SERBIA | Administration |
| RATP | FRANCE | Other Governmental Body |
| Raymarine Belgium Bvba | BELGIUM | Manufacturer |
| RCS S.p.A | ITALY | Manufacturer |
| Real.not | FRANCE | Service Provider |
| Red Hat Limited | IRELAND | Manufacturer |
| RED Technologies SAS | FRANCE | Service Provider |
| REDCA | UNITED KINGDOM | User |
| Renault SAS | FRANCE | User |
| Renesas Electronics Europe | GERMANY | Manufacturer |
| RFI SpA | ITALY | User |
| RIFT.io | UNITED STATES | Manufacturer |
| Riverbed | GERMANY | Manufacturer |
| ROBERT BOSCH GmbH | GERMANY | Manufacturer |
| Rogers Communications Canada | CANADA | Network Operator |
| ROHDE & SCHWARZ | GERMANY | Manufacturer |
| ROHILL Technologies B.V. | NETHERLANDS | Manufacturer |
| Royal Holloway | UNITED KINGDOM | University |
| RQC | RUSSIAN FEDERATION | Research Body (Private) |
| RTX A/S | DENMARK | Manufacturer |
| Ruckus | IRELAND | Manufacturer |
| Rundfunk & Telekom | AUSTRIA | Administration |
| RunEL | ISRAEL | Manufacturer |
| SABS | SOUTH AFRICA | Administration |
| Safelayer | SPAIN | Service Provider |
| SAFT SA | FRANCE | Observer |
| Sagemcom Broadband SAS | FRANCE | Manufacturer |
| Saguna Networks Ltd | ISRAEL | Manufacturer |
| Samsung Electronics Benelux BV | NETHERLANDS | Manufacturer |
| Samsung Electronics Czech | CZECH REPUBLIC | Manufacturer |
| Samsung Electronics France SA | FRANCE | Manufacturer |
| Samsung Electronics GmbH | GERMANY | Manufacturer |
| Samsung Electronics Iberia SA | SPAIN | Manufacturer |
| Samsung Electronics Nordic AB | SWEDEN | Manufacturer |
| Samsung Electronics Polska | POLAND | Manufacturer |
| Samsung Electronics Romania | ROMANIA | Manufacturer |
| Samsung R&D Institute UK | UNITED KINGDOM | Manufacturer |
| Sandvine Incorporated | CANADA | Manufacturer |
| Sapcorda | GERMANY | Service Provider |
| Sasken | INDIA | Other |
| Sat4M2M | GERMANY | Network Operator |
| Satel Oy | FINLAND | Manufacturer |
| Satixfy | ISRAEL | Manufacturer |
| SBA Research | AUSTRIA | Research Body (Public) |
| SBS aisbl | BELGIUM | User |
| Scania CV AB | SWEDEN | Manufacturer |
| Schneider Electric Industries | FRANCE | Manufacturer |
| Sealed sprl | BELGIUM | Consultancy Company/Partnership |
| Secure Chorus | UNITED KINGDOM | Other |
| SecureRF Corporation | UNITED STATES | Other |
| SECURITE COMMUNICATIONS | FRANCE | Manufacturer |
| Security &Standards Associates | UNITED KINGDOM | Consultancy Company/Partnership |
| Security Service | SWEDEN | Other Governmental Body |
| Sedam IT d.o.o. | CROATIA | Manufacturer |
| SEFIRA | CZECH REPUBLIC | Consultancy Company/Partnership |
| SEMIC RF | GERMANY | Manufacturer |
| Semtech Neuchatel SA | SWITZERLAND | Manufacturer |
| Sennheiser Electronic GmbH | GERMANY | Manufacturer |
| Sensinov | FRANCE | Manufacturer |
| Sensium Healthcare Ltd | UNITED KINGDOM | Manufacturer |
| Sensus UK | UNITED KINGDOM | Manufacturer |
| Sepura PLC | UNITED KINGDOM | Manufacturer |
| Sequans Communications | FRANCE | Manufacturer |
| SES S.A. | LUXEMBOURG | Network Operator |
| SEVEN PRINCIPLES | GERMANY | Consultancy Company/Partnership |
| SGDSN | FRANCE | Administration |
| SGS Wireless | UNITED KINGDOM | Service Provider |
| SHARP Electronics GmbH | GERMANY | Observer |
| SHURE Europe GmbH | GERMANY | Manufacturer |
| SIAE Microelettronica SpA | ITALY | Manufacturer |
| SICK AG | GERMANY | Manufacturer |
| Siemens AG | GERMANY | Manufacturer |
| Sierra Wireless, S.A. | FRANCE | Manufacturer |
| SIGFOX | FRANCE | Manufacturer |
| SIGFOX SAS | FRANCE | Network Operator |
| Signicat AS | NORWAY | Service Provider |
| SIGOS GmbH | GERMANY | Consultancy Company/Partnership |
| Siklu Communication Ltd. | ISRAEL | Manufacturer |
| Silicon Laboratories | UNITED STATES | Manufacturer |
| Simoco | UNITED KINGDOM | Manufacturer |
| Sintesio, Foundation | SLOVENIA | Other |
| SIST | SLOVENIA | Administration |
| Sisvel | LUXEMBOURG | Other |
| Skylane Optics | LUXEMBOURG | Manufacturer |
| Skyworks Solutions Inc. | UNITED STATES | Other |
| SNCF RESEAU | FRANCE | Other Governmental Body |
| SnT - University of Luxembourg | LUXEMBOURG | University |
| Softel Systems Pty Ltd | AUSTRALIA | Manufacturer |
| Softil Ltd | ISRAEL | Manufacturer |
| Software602 a.s. | CZECH REPUBLIC | Consultancy Company/Partnership |
| SOMFY INTERNATIONAL | FRANCE | Manufacturer |
| Sony Europe B.V. | UNITED KINGDOM | Manufacturer |
| SP Technical Research | SWEDEN | Research Body (Public) |
| SpaceX | UNITED STATES | Manufacturer |
| Spirent Communications | UNITED STATES | Manufacturer |
| Sporton International Inc | TAIWAN, PROVINCE OF CHINA | Service Provider |
| Sprava zeleznicni dopravni | CZECH REPUBLIC | Other Governmental Body |
| SPRINT Corporation | UNITED STATES | Service Provider |
| SRG Research and Consulting | UNITED STATES | Consultancy Company/Partnership |
| SSNS | HUNGARY | Other Governmental Body |
| STIB-MIVB | BELGIUM | User |
| Stihl Tirol | AUSTRIA | Manufacturer |
| STMicroelectronics | SWITZERLAND | Manufacturer |
| StreamWide | FRANCE | Manufacturer |
| Suomen virveverkko Oy | FINLAND | Network Operator |
| Swiss Federal Railways Ltd | SWITZERLAND | User |
| SWISSCOM | SWITZERLAND | Network Operator |
| Swissphone Wireless AG | SWITZERLAND | Manufacturer |
| SyncTechno Inc. | KOREA (REPUBLIC OF) | Research Body (Private) |
| SYSOCO | FRANCE | Manufacturer |
| Systemics PAB Sp. z.o.o. | POLAND | Service Provider |
| Tait Europe Limited | AUSTRIA | Manufacturer |
| TCT Mobile Limited | CHINA | Manufacturer |
| TDF | FRANCE | Network Operator |
| TE Connectivity | UNITED STATES | Manufacturer |
| Techem Energy Services GmbH | GERMANY | Manufacturer |
| Technicolor | FRANCE | Manufacturer |
| TekVizion PVS Inc. | UNITED STATES | Consultancy Company/Partnership |
| TELECOM ITALIA S.p.A. | ITALY | Network Operator |
| Teleconnect GmbH | GERMANY | Research Body (Private) |
| Telefonica Germany GmbH | GERMANY | Network Operator |
| TELEFONICA S.A. | SPAIN | Network Operator |
| Telekom Albania | ALBANIA | Network Operator |
| Telekom Deutschland GmbH | GERMANY | Network Operator |
| TELENOR ASA | NORWAY | Network Operator |
| Telensa Limited | UNITED KINGDOM | Consultancy Company/Partnership |
| Telerad | FRANCE | Manufacturer |
| Teleste Corporation | FINLAND | Manufacturer |
| TeleTrusT | GERMANY | User |
| Telia Company AB | SWEDEN | Network Operator |
| Telit Communications S.p.A. | ITALY | Manufacturer |
| TELKOM SA SOC Ltd | SOUTH AFRICA | Network Operator |
| TELP Consultancy BV | NETHERLANDS | Consultancy Company/Partnership |
| Telstra Corporation Limited | AUSTRALIA | Network Operator |
| Tencastle Limited | UNITED KINGDOM | Consultancy Company/Partnership |
| Terma A/S | DENMARK | Manufacturer |
| TEXAS Instruments | FRANCE | Manufacturer |
| THALES | FRANCE | Manufacturer |
| The Police of the Netherlands | NETHERLANDS | User |
| THRANE & THRANE A/S | DENMARK | Manufacturer |
| THURAYA TELECOM CO. | UNITED ARAB EMIRATES | Network Operator |
| TIMT | POLAND | Consultancy Company/Partnership |
| T-Mobile Austria GmbH | AUSTRIA | Network Operator |
| T-Mobile Polska S.A. | POLAND | Network Operator |
| TnBS | FRANCE | Consultancy Company/Partnership |
| TNO | NETHERLANDS | Research Body (Public) |
| Toshiba | UNITED KINGDOM | Service Provider |
| TOYOTA Info Technology Center | UNITED STATES | Research Body (Private) |
| TRA | UNITED ARAB EMIRATES | Observer |
| TRAFICOM | FINLAND | Administration |
| Trafikverket | SWEDEN | Other Governmental Body |
| Traxens SAS | FRANCE | Other |
| TRC | JORDAN | Observer |
| Trend Micro Inc. | UNITED STATES | Manufacturer |
| TRIORAIL GmbH & Co.KG | GERMANY | Manufacturer |
| trovicor | UNITED ARAB EMIRATES | Other |
| Truphone | UNITED KINGDOM | Network Operator |
| TrustWeaver AB | SWEDEN | Service Provider |
| Tsofun Algorithm Ltd. | ISRAEL | Research Body (Private) |
| TTÜ | ESTONIA | University |
| TU Graz | AUSTRIA | University |
| Tubitak Uekae | TURKEY | Research Body (Public) |
| T-UI | GERMANY | User |
| Turing Lovelace | UNITED STATES | Other |
| TURK TELEKOMUNIKASYON A.S. | TURKEY | Network Operator |
| TURKCELL | TURKEY | Network Operator |
| TÜV NORD | GERMANY | Consultancy Company/Partnership |
| TUV SUD BABT | UNITED KINGDOM | Administration |
| U.S. Bank | UNITED STATES | Other |
| UBiqube | IRELAND | Other |
| Ubisense Ltd | UNITED KINGDOM | Manufacturer |
| Ubiwhere Lda (UW) | PORTUGAL | Service Provider |
| u-blox AG | SWITZERLAND | Manufacturer |
| UC | SPAIN | University |
| UK CAA | UNITED KINGDOM | Administration |
| UKE | POLAND | Administration |
| UL VS Ltd | UNITED KINGDOM | Service Provider |
| UMH de Elche | SPAIN | University |
| Unibridge AS | NORWAY | Consultancy Company/Partnership |
| UNICON.UZ | UZBEKISTAN | Research Body (Public) |
| Uninfo | ITALY | User |
| Union Inter. Chemins de Fer | FRANCE | User |
| UNIVBRIS | UNITED KINGDOM | University |
| Universität Bremen | GERMANY | University |
| Universität Kaiserslautern | GERMANY | University |
| University of Athens | GREECE | University |
| University of Bradford | UNITED KINGDOM | University |
| University of Oulu | FINLAND | University |
| University of Waterloo | CANADA | Research Body (Public) |
| University of Zagreb | CROATIA | University |
| UNIVLEEDS | UNITED KINGDOM | University |
| UPV/EHU | SPAIN | University |
| US Cellular Corporation | UNITED STATES | Network Operator |
| UTIMACO TS GmbH | GERMANY | Manufacturer |
| UTokyo | JAPAN | University |
| UWB Alliance | UNITED STATES | Other |
| Uwinloc | FRANCE | Manufacturer |
| VAISALA OYJ | FINLAND | Manufacturer |
| Valeo | GERMANY | Manufacturer |
| Valeo Radar Systems Inc. | UNITED STATES | Manufacturer |
| VALID SOLUCIONES TECNOLÓGICAS | SPAIN | Manufacturer |
| Vasona Networks Inc | UNITED STATES | Manufacturer |
| Vayyar | ISRAEL | Manufacturer |
| VDA | GERMANY | Other |
| VEGA Grieshaber KG | GERMANY | Manufacturer |
| VELUX A/S | DENMARK | Manufacturer |
| Veolia Environnement S.A. | FRANCE | Service Provider |
| Verint | ISRAEL | Manufacturer |
| Verisure Innovation AB | SWEDEN | Service Provider |
| Verizon UK Ltd | UNITED KINGDOM | Network Operator |
| Via Licensing | UNITED STATES | Manufacturer |
| Viasat Group | ITALY | Service Provider |
| ViaSat Satellite Holdings Ltd | UNITED KINGDOM | Manufacturer |
| ViaviSolutions Deutsch. GmbH | GERMANY | Manufacturer |
| VICI | FRANCE | Consultancy Company/Partnership |
| VMware Bulgaria EOOD | BULGARIA | Manufacturer |
| Vodafone España SA | SPAIN | Network Operator |
| Vodafone GmbH | GERMANY | Network Operator |
| VODAFONE Group Plc | UNITED KINGDOM | Network Operator |
| Vodafone Ireland Plc | IRELAND | Network Operator |
| Vodafone Italia SpA | ITALY | Network Operator |
| Vodafone Romania S.A. | ROMANIA | Network Operator |
| Vodafone Telekomünikasyon A.S. | TURKEY | Manufacturer |
| VoiceAge Corporation | CANADA | Manufacturer |
| Voipfuture | GERMANY | Manufacturer |
| Volkswagen AG | GERMANY | User |
| Volvo Car Corporation | SWEDEN | Manufacturer |
| Volvo Technology Corporation | SWEDEN | Manufacturer |
| Vonniman Consulting | SWEDEN | Consultancy Company/Partnership |
| VT iDirect Solutions Ltd | IRELAND | Manufacturer |
| VTT | FINLAND | Research Body (Public) |
| WABCO GmbH | GERMANY | Manufacturer |
| Watchdata | CHINA | Observer |
| WE Certification Oy | FINLAND | Other |
| West Pomeranian University | POLAND | University |
| Wi-Fi Alliance | UNITED STATES | Other |
| WINGS | GREECE | Other |
| Wipro Limited | INDIA | Service Provider |
| Wireless Partners S.L.L. | SPAIN | Consultancy Company/Partnership |
| Wireless Power Consortium | UNITED STATES | Manufacturer |
| Wirepas Oy | FINLAND | Manufacturer |
| xFlow Research Inc. | UNITED STATES | Research Body (Private) |
| Xilinx Ireland | IRELAND | Manufacturer |
| Yaana Limited | UNITED KINGDOM | Service Provider |
| Yaesu Musen Co. Ltd. | UNITED KINGDOM | Manufacturer |
| Yokogawa Europe B.V. | NETHERLANDS | Manufacturer |
| Zeata Security Ltd | UNITED KINGDOM | Consultancy Company/Partnership |
| Zeineddin PLLC | UNITED STATES | Consultancy Company/Partnership |
| ZES BVBA | BELGIUM | Manufacturer |
| ZITiS | GERMANY | Other Governmental Body |
| Zodiac Aerospace SA | FRANCE | Manufacturer |
| Zollkriminalamt (ZKA) | GERMANY | Administration |
| ZTE Corporation | CHINA | Manufacturer |
| ZTE Wistron Telecom AB | SWEDEN | Research Body (Private) |
| ZVEI | GERMANY | Other |