Country - US States & Territories
- 365 Wireless USA
- ACS Wireless
- Aerialink
- AIO Wireless
- Airadigm Einstein PCS
- Alaska DigiTel
- Altice
- Altice Mobile
- Appalachian Wireless
- ASTAC (Arctic Slope Telephone Association Cooperative)
- AT&T
- Bandwidth
- Blue Wireless
- Bluegrass Cellular
- Boost (DISH)
- Brightlink
- C Spire Wireless (Cellsouth)
- Carolina West Wireless
- Cellcom
- CellOne / Cellular One
- CellSouth
- Chariton Valley Cellular
- Chat Mobility
- Choice Wireless
- Cingular
- ClearSky Wireless
- CommnetWireless
- Copper Valley
- CordovaWireless
- COX Communications
- Cricket
- Cross Wireless
- CTC Telecom Mosaic
- DISH Wireless
- DTC Wireless
- Duet IP
- Element Mobile
- Enflick US
- EpicTouch
- ETex USA
- Evolve Cellular
- First Point US
- GCI Communications
- Golden State Cellular
- Google Voice
- Illinois Valley Cellular
- Immix Wireless
- Indigo Wireless
- Inland Cellular
- Inteliquent
- ISP Telecom
- iWireless
- James Valley Cellular
- Leaco
- Limitless Mobile
- MetroPCS
- Mid Rivers Communications
- MobiPCS
- Mohave Cellular
- mPulse mobile
- MTA Communications
- Naked Mobile
- Nemont/Sagebrush
- Nex-Tech Wireless
- Northwest Cell
- Northwest Missouri Cellular
- nTelos
- Number Access
- Pacific Telecom
- Panhandle Telecommunications
- PeeringHub
- Peerless Networks
- Peoples Wireless
- Pine Belt Cellular
- Pine Cellular
- Pinger
- PinPoint Communications
- Pioneer
- Plateau Wireless
- Plivo
- Revol Wireless
- RingCentral
- Shellcom
- SI Wireless
- Southern Linc
- Sprint
- SRT Wireless
- Standing Rock
- T-Mobile
- Telcentris
- Telnyx
- TextMe
- textPlus
- Thumb Cellular
- Tracphone Wireless
- Triangle Mobile
- Truphone
- TSG Global (Flextalk)
- Tychron
- U.S. Cellular
- Union Wireless
- United Wireless
- Verizon
- Verizon Wireless Puerto Rico
- Viaero Wireless
- Virgin Mobile
- Viya (USVI)
- Vonage
- West Central Wireless (WCC)
- ZipWhip
Country - Canada
- Bell Mobility
- Eastlink
- Execulink
- Fido
- Iristel
- Lynx Mobile
- Microcell
- Mobilicity
- MTS Mobility
- Rogers Wireless
- SaskTel Mobility
- SSI Canada
- Telus (including Koodo)
- Vidéotron
- Virgin Mobile Canada
- Wightman Telecom
- Wind Mobile