The following is a complete list of Metaswitch's publicly announced customers.
1stel 3 Rivers Communications Access Integrated Networks ACD.net Acme Communications Aeneas Aero Communications Akabis Alaska Telephone Company (ATC) AMA•TechTel American BroadBand and Telecommunications AmeriMex Communications Corp. Arvig Communication Systems Astound Broadband AT&T BayRing Communications BBCom Bell Aliant / Télébec Ben Lomand Telephone Cooperative Big River Telephone Birch Communications Blackfoot Telephone Bluegrass Network Bresnan Communications Bristol Tennessee Essential Services (BTES) Bristol Virginia Utilities (BVU) British Telecom BroadRiver Communication Corporation BroadStar Communications Broadview Networks BTC Broadband Butler-Bremer Communications Cable & Wireless International CallConnect-Us Castleberry Telephone Company Cavalier CenturyLink Champaign Telephone Company Clear Creek Telephone and TeleVision Coastal Communications Cochrane Telephone CommuniGroup ComSpanUSA ComSouth Conference Plus Cornerstone Telephone Company Covista Cunningham Communications Dialogix Telecom EATEL Ellijay Telephone Emery Telcom Engage Communications ENMR Plateau EUTEL Execulink FastTrack Communications First Communications foreThought.net Frontier Communications Graceba Total Communications, Inc. GTA TeleGuam GVTC Hawaii Dialogix Telecom Hiawatha Communications Horry Telephone Cooperative (HTC) Independence Light & Power, Telecommunications Iowa Network Services IRIS IT&E ITS Telecom Jaguar Communications Lafayette Utilities Systems
MAIN Marbel Telephone Systems Matanuska Telephone Association MCV Broadband Mescalero Apache Telecom, Inc. (MATI) MINET Misami Oriental Telephone System Inc. Missouri Telecom, Inc. MNSi Mountain Rural Telephone Netbriefings Telecom Nevada Comstock Communications New Knoxville Telephone Company Newroads Telecom Nexicom Nextera Communications Norlight Telecommunications Northwest Telephone, Inc NPG Cable NTS Communications One Communications Ontario & Trumansburg Telephone Companies OPT French Polynesia Pacific Centrex Services (PCS1) Partner Communications Pembroke Telephone Company Penasco Valley Telecommunications Phone Power Plant Telecommunications POPP.com Progressive Rural Telephone Project Mutual Telephone Public Interest Network Services (PINS) Range Telephone Cooperative RCN REMI Communications Ridgeville Telephone Ritter Communications Rural Telephone Sacred Wind Communications Saddleback Communications Sandwich Isles Communications Santa Barbara Utilities Satel Southern Kansas Telephone Sovernet Communications Sprint SureWest TeleBarbados Télébec TelePacific Communications Telephone Electronics Corporation (TEC) ThinkTel Communications Tricom Tri-County Telephone Troy Cable Union Springs Telephone Company Utility Telephone Valley TeleCom Valtech Communications Vidia Communications Vision Net VoIP Corporation Wabash Mutual Telephone Wave Broadband Wavecom Solutions (formerly Pacific LightNet) Western Iowa Telephone Wightman Telecom Ltd Windomnet Windstream WorldNet Yelcot Telephone Company Yukon Telephone
Each of the following large companies licenses multiple Metaswitch products.