- 6d Technologies
- 6G World
- A. T. Kearney
- Aarav Solutions
- Accenture
- Alarm.com
- Aljeel aljadeed for Technology
- Allot Ltd
- Almadar Aljadid
- Altice Labs, S.A
- Altice Portugal
- Amazon Web Services, Inc.
- Amdocs Management Limited
- Analysys Intenational
- Analysys Mason
- Antel-Uruguay
- Appledore Research Group
- Apptium
- ArctosLabs Scandinavia AB
- Aria Systems Inc.
- AsiaInfo Technologies (China), Inc.
- AT&T Inc.
- Aussie Broadband Limited
- AvidThink LLC
- AVSystem
- AwareX, Inc.
- Axiata Digital Labs
- Axiata Group Berhad
- Azercell Telecom
- Bain & Company, Inc.
- Balesia Technologies, Inc.
- Bechtle
- Beijing Ultrapower Software Co., Ltd.
- Bell Canada
- Beyond Now GmbH
- BH Telecom, Joint Stock Company, Sarajevo
- Bharti Airtel Ltd
- BICS
- Binom d.o.o.
- Bloomberg LP
- BMC Software, Inc.
- BolgiaTen Limited
- Botswana Telecommunications Corporation
- Bouygues Telecom
- BT Consumer
- BT Group plc
- Cable & Wireless Seychelles
- Cambridge Consultants
- CamGSM
- Capgemini
- Celfocus
- Cellcard Cambodia
- Cerillion Technologies Limited
- CGI Info Systems Management Consulting Inc.
- China Academy of Information and Communications Technology(CAICT)
- China Mobile Communications Corporation
- China Telecommunications Corporation
- China Unicom
- Chunghwa Telecom Company LTD
- Ciena Corporation
- CityFibre
- Claro Brasil
- CloudBlue
- Cloudera Inc.
- Cloudsense Ltd.
- CMC Networks
- Colt Technology Services
- Comarch S.A.
- Converge ICT
- Counterpoint Research
- COVALENSE DIGITAL SOLUTIONS LLC
- Cox Communications, Inc.
- CRM.COM Software Ltd.
- Crown Castle
- CSG Systems, Inc.
- Data Centre Magazine
- Dell Technologies Inc.
- Destiny N.V, Dstny
- Detecon International
- Deutsche Telekom AG
- Developing Telecoms
- Dialog Axiata PLC
- DiGi Telecommunications Sdn Bhd
- Digia Finland Oy
- Digicel Group
- Digital Nasional Berhad
- DNA Plc
- DOD
- E-net
- Earthlink Telecommunications
- Econet Wireless Zimbabwe
- Edelweiss Service Consulting SàRL
- EE
- Effectus Research
- Effortel Technologies
- EITC (DU)
- Elisa Corporation
- Elisa Polystar
- Enghouse Networks Limited
- Entel Chile
- Epam Systems Ltd
- Ericsson Inc.
- Ernst & Young
- Etisalat Egypt
- Etisalat UAE
- ETIYA
- Euristiq
- Eutelsat
- Evergent Technologies, Inc.
- Eviden
- EZECOM Co., Ltd.
- Faroese Telecom
- FASTWEB
- Fibrasil infraestrutura e fibra otica S.A.
- FICO
- FNT GmbH
- Frost & Sullivan
- Gartner
- GBI
- GCI Communication Corp
- GDi CMT Global LLC
- GIP Exyr GmbH
- Gitlab
- Global Data
- Global Wavenet Pte Ltd
- GlobalConnect A/S
- Globe Telecom Inc.
- Globetom
- Globys, Inc.
- Gomibo Group
- Google Cloud
- GSM Association
- GTT Communications
- Halleyx Inc.
- Hansen Technologies
- HAWE Telekom Sp. z o. o.
- Helmes
- Hestia Solutions OU
- Hi3G Denmark ApS
- Hong Kong Telecommunications (HKT) Limited
- Hrvatski Telekom d.d.
- Huawei Technologies Co. Ltd
- Hutchison 3G Austria GmbH
- Hutchison 3G UK
- i2i Systems
- IBM Corporation
- IDC
- Incedo Inc.
- Indosat Ooredoo Hutchison
- Inetum
- Informa Telecoms & Media
- Infosim GmbH & Co. KG
- Infosys
- Inmanta
- Innova Solutions Inc
- Innovile Technology S.L.
- Integrated Telecom Company
- Intel Corporation
- Intracom Telecom
- IPLAN
- Iquall Networks Inc
- Iridium Communications Inc.
- ITgma
- Jazz Pakistan
- Jio Platforms Limited
- JT (Jersey) Ltd
- KDDI Corporation
- KDDI Research, Inc.
- Keyrus
- Kloudville Inc.
- Levio Consulting Inc.
- Lewis Insight
- Liberty Global Services B.V.
- Liberty Latin America
- Libyana for Mobile Phones
- Light Reading
- LightStorm
- Link Mobility Group
- LMT (Latvijas Mobilais Telefons)
- Locatium.AI
- LotusFlare
- Lumen
- Lumine Group
- Lyse Tele AS
- M1 Limited
- Makman Technology Consulting
- Marand Software ltd
- Market Mettle
- MÁSMÓVIL
- MATRIXX Software
- Mauritius Telecom
- Mavenir Systems
- McKinsey & Company, Inc
- MEF.DEV
- MicroNova AG
- Microsoft Corporation
- Millicom International Cellular S.A.
- Mimik
- Ministry of Foreign Affairs of Denmark
- Mobile Magazine and Data Centre
- Mobitel (Pvt) Ltd
- mtel Banja Luka
- MTN South Africa
- MTN Uganda
- MYCOM OSI
- Nagarro Software Pvt Ltd
- Napatech
- NBNCo Ltd
- Netadmin System i Sverige AB
- Netcompany-Intrasoft S.A.
- Netcracker Technology
- Neterra EOOD
- Netradar
- Nexonera
- Nokia
- Norlys
- NOS Technology
- NTS Retail KG
- NTT DATA CORPORATION
- NTT DOCOMO
- NTT Group
- Nuuday
- Nvidia
- Odido Netherlands B.V.
- Omdia
- Ooredoo Group
- Ooredoo Oman
- Optare Solutions
- Oracle Corporation
- Orange
- Orange Caraibe
- Orange Polska
- Orange Romania
- ORS Comm GmbH & Co KG
- OSSEra
- PCCW Global
- Pegasystems, Inc.
- Persistent Systems Ltd
- Philippine Long Distance Telephone Company (PLDT)
- PI WORKS
- PiA Bilişim Hizmetleri A.Ş.
- PlatformX Communications (PXC)
- Platinion GmbH
- POCA Group
- Polkomtel S.A. (PLUS)
- Post Group
- Praxedo
- Pretius
- Prodapt
- Prodapt North America, Inc
- Proximus SA
- PT LINK NET TBK
- PT Telekomunikasi Selular
- PT XL Axiata Tbk.
- PTC
- Qeema Consultancy and Technology Service
- Quantexa
- Questex Asia Limited
- Qvantel Oy
- Rakuten Mobile, Inc.
- Rakuten Symphony
- RCR Wireless News
- Readiness IT Systems Integration, S.A.
- Realworld Systems
- Recon Analytics
- Red Hat, Inc.
- Reply
- Riva Media
- Rivada Space Networks
- Royal KPN N. V.
- Safaricom PLC
- Salesforce
- Samsung Research Institute UK
- SAS Institute Inc
- Saudi Telecom Company
- SBB Telecom
- Senza Fili
- ServiceNow
- SES Astra S.A.
- SI-TECH Information Technology Ltd.
- SigScale
- Singapore Telecommunications Limited
- SingTel Optus
- SK Telecom
- Sneeyeg
- Snowflake Inc.
- Soft-ex
- SoftBank Corp
- solvatio AG
- Spark New Zealand Limited
- Spinnaker Support
- Sri Lanka Telecom PLC
- Stechs
- STL Partners
- Strand Consult
- Subex Inc
- Summa Networks
- Sunrise Communications AG
- Sunset Technologies
- Suntech S.A.
- Sutherland Global Services
- Swisscom (Schweiz) AG
- T-Mobile Czech & Slovak Telekom, a.s.
- T-Mobile Poland SA
- T-Systems International Services GmbH
- Tata Communications Ltd
- Tata Consultancy Services
- Tata Elxsi Ltd
- TDC NET A/S
- Tech Mahindra Limited
- TechNarts (Nart Bili?im)
- TechNEconomY DK
- Tecnotree
- Telco Republic
- Telecom Argentina, S.A.
- Telecom Egypt
- Telecom Italia SpA
- Telecom Italia Sparkle S.p.A.
- TelecomTV
- Telefonica
- Telefonica Germany GmbH & Co. OHG
- Telefonica I + D
- Telekom Austria AG
- Telekom Slovenije
- Telekom Srbija
- Telemach d.o.o.
- Telenet NV
- Telenity
- Telenor ASA
- Telenor Denmark
- Telenor Sverige
- Telesat LEO Inc.
- Telia Company
- Telia Lithuania
- Telin (a Telkom Company)
- Telkom SA
- Telstra Corporation
- TELUS
- Telus International
- TerreStar Solutions Inc. DBA Strigo
- The Boston Consulting Group
- The Futurum Group
- The Institute of Electrical and Electronics Engineers Incorporated
- The Mobile Network
- TietoEVRY
- TM Technology Services Sdn Bhd
- Totogi
- Toyota Motor Corporation
- TPG Telecom Limited
- Tr3dent
- Trafikverket
- Transform & Trust Advisory Ltd
- Transforma Insights
- triPica
- Triple-Innovations Ltd
- TT-Netværket
- Tupl Inc
- Turkcell Iletisim Hiz AS.
- Turknet
- UBiqube
- Unified National Networks Sdn Bhd
- Unitel Group
- University of York
- US Cellular Corporation
- Vanrise
- Verizon Communications
- Vietnam Posts and Telecommunications Group (VNPT)
- Viettel Corporation
- Virgin Media
- Virgin Media Ireland
- Virgin Media O2
- Virtusa Corporation
- Vodafone GmbH
- Vodafone Group
- Vodafone Idea Limited
- Vodafone Romania SA
- Vodafone UK Ltd
- VodafoneZiggo
- Volt Active Data
- We Love Micro
- Whale Cloud Technology Co., Ltd
- Yousee
- YTL Communication Sdn Bhd
- Zain Group - Mobile Telecommunications Company K.S.C.P
- Zain Iraq
- Zayo Group, LLC
- Zinkworks
- ZIRA Ltd.
- ZTE Corporation
*Registered companies as of 17 May 2024