VoIP Service Providers  | 1TouchTone | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | AEMcom Srl | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | IT | Market: | Italy | |  | (aq) | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | UK | Market: | United Kingdom | |  | AOL | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | AT&T | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | BroadVoice | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | BroadVox Direct | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | calleveryone | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | CallGate | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | BG, DE, UK, US | Market: | Worldwide | |  | CliConnect | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | CA, UK, US | Market: | Worldwide | |  | EarthLink | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | Engin | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | AU | Market: | Australia | |  | Encounta | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | private | Market: | Australia | |  | euphonex | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device Asterisk PBX Supported
| Numbers: | US, CA, UK, MX, JP, IT, FR, ES, AR, BR, CL, PE, SG | Market: | Worldwide | |  | EW Communications | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | UK | Market: | United Kingdom | |  | Fastweb | |
| Services: | Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | IT | Market: | Italy | |  | GalaxyVoice | |
| Services: | Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | iConnectHere | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | private | Market: | Worldwide | |  | ifreedom | |
| Services: | PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | private | Market: | CA,UK,US | |  | Gizmo Project | |
| Services: | PC to phone calling (via a soft phone) PC to PC voice calls
| Numbers: | private | Market: | Worldwide | |  | ineen | |
| Services: | PC to PC voice calls PC to PC video calls
| Numbers: | private | Market: | Worldwide | |  | ivoz | |
| Services: | PC to phone calling (via a soft phone) PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | BR | Market: | BR | |  | IP Connection | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | private | Market: | US | |  | Lingo | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | AR, AU, BR, CA, FR, GT, HK, IT, JP, KR, PR, TW, UK, US | Market: | US | |  | Majosa Communications | |
| Services: | PC to phone calling (via a soft phone) PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | US | Market: | Worldwide | |  | Mconnect, Inc. | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | US | Market: | Worldwide | |  | MyWebCalls | |
| Services: | PC to phone calling (via a soft phone) PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | private | Market: | Worldwide | |  | MyPhoneCompany | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | Net2Phone | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | CA, UK, US | Market: | CA, UK, US | |  | NuFone Network | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls PC to PC video calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | private | Market: | US | |  | Nuvio | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | OmniLEC | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls PC to PC video calls Phone to Phone calls Phone calls from a hardware IP phone
| Numbers: | US | Market: | US | |  | Packet8 | |
| Services: | PC to PC video calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | SimpleTelecom | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | SIP Phone | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | UK,US | Market: | US | |  | Skype | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls
| Numbers: | private + DK, FI, FR, HK, NO, SE, UK, US | Market: | Worldwide | |  | SunRocket | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | TeliPhone | |
| Services: | Phone to Phone calls Phone calls from a hardware IP phone
| Numbers: | CA | Market: | CA, US | |  | TelTel | |
| Services: | PC to PC voice calls
| Numbers: | private | Market: | Worldwide | |  | Tierzero | |
| Services: | Hosted VoIP Services PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls PC to PC video calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | Time Warner Cable | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | Unlimitel | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | CA | Market: | Canada | |  | USA Datanet | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | Verizon | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | Wazatel | |
| Services: | PC to phone calling (via a soft phone) PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | private | Market: | Worldwide | |  | Vbuzzer | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls
| Numbers: | CA, US | Market: | Worldwide | |  | via:talk | |
| Services: | Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | Voiceglobe | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | US, BE, UK, FR, ES, IT, DE | Market: | Worldwide | |  | VoicePulse | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | VoIPAmerican | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | VoIP Buster | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls
| Numbers: | private | Market: | Worldwide | |  | VoIP.net | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | |  | VoIPTalk | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware IP phone Phone calls from a hardware ATA device
| Numbers: | UK | Market: | UK | |  | Vonage | |
| Services: | PC to phone calling (via a soft phone) Phone to PC calls PC to PC voice calls Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | CA, MX, UK, US | Market: | CA, US | |  | VOZ Online | |
| Services: | Phone to Phone calls Phone calls from a hardware ATA device
| Numbers: | US | Market: | US | | |
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