- Advanced Communications Technology (ACT)
- Aerux Broadband
- Allo Communications
- Alorica
- AtratoIP Networks
- ATT
- Blackfoot Communications
- Centennial Board of Cooperative Educational Services
- CenturyLink
- CloudFlare
- Clearfly Communications
- Cogent Communications
- Collins Communications Inc.
- Colorado Central Telecom
- Charter Communications
- Colorado Communications Transport
- Comcast Corporation
- CoreSite
- Dish Corporation
- Ecovate RT
- Education Networks of America (ENA)
- Faction
- Fastly
- FastTrack Communications, Inc.
- FiberX
- Firstlink Technologies
- Forethought
- Futurum Communications
- GIGAMONSTER
- Global Capacity
- Great Plains Communications
- Greenfly Networks Inc., a Nevada corporation
- GTT
- Handy Networks, LLC
- Hibernia Atlantic U.S. LLC
- High Country Internet, Inc
- Hurricane Electric
- IIX Inc.
- InfoBunker
- Integra
- Intermedia
- Internap
- International Business Machines Corp.
- Iowa Communications Network
- IPC Network Services, Inc.
- IPTP, LLC
- IX-Denver
- Kellin Communications
- Layer42
- Level(3) Communications
- Lightower Fiber Networks II, LLC
- LiveAir Networks
- LR Communications
- Mammoth Networks
- Massive Networks
- Megapath
- MHO Networks
- Microsoft
- Midcontinent
- Near North Partners, LLC
- Network Billing Systems, LLC
- Network Innovations
- NTT
- Onvoy
- Peerless Network
- QWK.net
- Rockynet
- Rsync.net
- Rundberg, Inc. DBA Fire Tree Telephone Company
- SECOM
- Simple Signal
- SKYBEAM
- South Dakota Networks
- Sprint
- Sundial Communications
- Syringa Networks
- Tata Communications
- TDS Telecom
- The 6x7 Networks
- Telekenex, Inc
- Telia Carrier
- Telex
- Twilio
- Time Warner Cable
- UCAR/NCAR
- Union Wireless
- United Private Networks
- USA Communications
- Vast Broadband
- Verizon
- Verso Networks
- Viaero Wireless
- Visionary
- VistaBeam
- Vitelity
- VLEC Communications
- Vubiquity
- Washington Call Communications
- Whitesky Communications
- Windbreak Cable
- Windstream
- Wolfe Internet Services
- XO Communications
- Zayo
