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Full Customer List
- 21st Century Telecom
- 360 Networks
- A & A TeleData Services
- ACC Corp.
- Access One
- Access Point, Inc.
- ACN, Inc.
- Airband
- Alaska DigiTel
- Alestra
- ALLO
- Allstream
- altafiber
- American Lightwave
- AmericaTel
- ANI Networks
- Armstrong Telephone Company
- Aspen Leaf Networks
- Associated Network Partners Inc. (ANPI)
- Astound Broadband
- Atlas Communications, Ltd
- ATX Telecommunications Services, Inc.
- Aureon
- AXCESS Networks
- AXS Telecom
- Axtel
- Bandwidth
- BCM One
- BEK Communications Cooperative
- Ben Lomand Connect
- BestComm, LLC.
- Birch
- Blair Telephone
- Blue Valley
- Broad Margin
- Broadview Networks
- BTES
- BTI Communications
- BVU
- Cable Bahamas
- CABS Agent
- Callax / Dial Around
- Call One
- CapRock
- Capsule Communications
- Carolina West Wireless
- Cavalier Telephone
- Cedar Valley Communications
- Cellular 2000
- Cellular One of E/C Illinois
- Cellular One of N/E Pennsylvania
- C3ntro
- CenturyLink/CenturyTel
- CGI Long Distance Services
- Charter Communications
- Chillicothe Telephone Company
- CIMCO
- Cincinnati Bell
- Cleartel Communications
- Communication Management Services
- Coastal Communications
- Com Tech International Corp
- Comcast
- ComLink
- CommRad.com
- Commonwealth Long Distance
- Community Long Distance, Inc.
- Comporium
- Consolidated Communications
- ConvergeOne
- Conversent Communications, LLC
- Copper Valley Solutions
- Covista
- Cox Communications
- C Spire
- CTC Communications
- CTS Telecom
- Cyberlink Pacific Telecommunications
- Datalink Design
- DeltaCom
- Direct Communications
- Discovery Tel
- Distributel
- Dobson Telephone
- D-Two Communications
- E.Volve Technology Group, Inc.
- EarthLink
- Eclipse Communications
- EDCO, LLC
- Ellijay Telephone Company
- Emery Telcom
- Enventis
- ETEX Telephone Cooperative, Inc.
- Eureka
- Everstream
- Evolve IP
- Excel Communications
- Excell Agent Services
- Fairpoint Communications
- FastTrack Communications
- Filer Mutual
- First Communications, Inc.
- FirstLight
- Florida Digital Network, Inc.
- Frankfort Plant Board
- Frontier
- Fusion
- G Tel
- General Telephone & Electronic
- Genesis Telecommunications
- Genesys
- Global Network Providers
- Global Network Telephone
- Go2Tel
- Golden State Cellular
- GoNetspeed
- Granite Telecommunications
- Great Lakes Comnet
- Grid4 Communications
- Gridiron Fiber
- GTT
- Guam Telephone
- Hargray Telephone Company
- Hawaiian Telcom
- HickoryTech
- Horry Telephone Cooperative, Inc. (HTC)
- Hunter Communications
- ICT Services Corporation
- IDS Telecom
- IDT Corporation
- iiNet
- ILD Telecommunications
- Impact Telecom
- InContact
- Inland Cellular
- Insight
- Inteliquent
- Interactive Communications
- InterCall
- Intermedia Communications
- Intrado
- ITC DeltaCom
- iWireless
- Ixia
- Kinnet
- Knology
- LC Communications
- LDD, Inc.
- LibertySurf
- Lightship Telecom
- Lingo
- Logix Communications
- London Telecommunications
- Long Distance International, Inc.
- Lumos Networks
- M5
- Marshall Islands
- Masergy
- Matrix
- McGraw Communications
- McLeodUSA
- Mediacom
- Mercury
- Meriplex
- MetroNet
- Microtech-Tel
- MIDCO
- Mitel
- Mobile Tel
- Mpower
- MTPCS
- Nasstar
- Nations Telecom
- Navigata
- Net2000
- NetFortris
- Network Intelligence, Inc.
- Network Long Distance
- Network Operators
- NewCloud
- New Horizon Communications
- NewSouth Communications
- Nex-Tech Wireless
- Nextiva
- NICE
- Northland
- North State Communications
- NOSC
- NOVAXESS
- NOVO Networks
- NTS Communications
- Nuvox
- OLC Company
- One Communications
- OneStream Networks
- Onvoy
- Otelco (formerly OTT Communications)
- Pac-West Telecomm, Inc.
- PaeTec
- Peerless Network
- Personal Communications
- Phones Plus
- Pioneer Telephone Cooperative, Inc.
- Point Broadband
- PowerNet Global
- PressONE
- PRIMUS Telecommunications
- PRIMUS Telecommunications Australia
- PRIMUS Telecommunications UK
- PT-1 Communications
- Qwest Communications
- Reinvent Telecom
- Residential Communications Network
- Rev.io
- RGTS
- RingCentral
- Ringgold Telephone
- Saddleback Communications
- Sakon International, LLC
- Sangoma
- Segra
- ShoreTel
- SI Wireless
- SierraTel
- Simba Telecom
- Sinch
- Single Pipe
- SingTel
- Sirius
- SNIP Link, LLC.
- Soft Hemisphere
- Solarus
- South Carolina Net/Spirit Telecom
- Southern LINC
- Sovernet
- Spirit Telecom
- Star Telecommunications, Inc.
- StarTec
- State of Washington
- STI Prepaid / Telco Group
- STS Telecom
- Sunset Digital Communications
- Supra Telecom
- Switch Port Leasing
- Talk Talk Direct, Ltd (formerly VarTec Europe)
- TCAST Communications, Inc.
- TCC Communications, Inc.
- TCS (formerly One Call)
- TDS Telecom
- Tech Valley Communications, Inc.
- TECNET, INC.
- Tel America
- TelAlaska
- TeleBarbados
- TeleBermuda International
- Telecom One
- TeleHub Network Services Corp.
- Telekenex
- Telem Group of Companies
- Telepak
- Telephone Associates
- Telephone Systems of Georgia
- Telesystem
- TeliPhone
- TelNet Worldwide
- TexLink
- Thousand Islands Communications
- Thumb Cellular
- Time Warner Cable
- Touch America, Inc.
- Touchtone Communications
- TPG
- Transaction Network Services (TNS, Inc.)
- Transbeam
- Transnational Communications International, Inc. (TNCI)
- Trinity Valley
- Trinsic (formerly Z-Tel Communications, Inc.)
- UM Communications, Inc.
- Union Telephone
- United Wireless
- UNSI
- VarTec
- VarTec Europe
- Velocity Networks
- Vexus
- VIP Communications
- Wave Broadband
- WCS
- West
- Wide Open West
- Windstream / CT Communications, Inc.
- Wireless Maritime Services
- World Access Communications Corporation
- World Access Telecommunications
- WorldNet
- Xchange
- XO Communications
- ZAYO
- Zephyr Telecommunications, Inc.
- Zip Com
- Ziply Fiber
