Available SIP Trunk Providers

SIP Trunks / VoIP Providers connect 3CX to the public switched telephone network (PSTN). 3CX works with providers worldwide that have demonstrated compatibility with the 3CX Phone System. Approved providers are listed as either 3CX Tested, where testing is completed directly by 3CX, or VoIP Provider Tested, where the provider completes the required testing and submits the results to 3CX for review. Pre-configured templates are included in 3CX for quick and easy setup.

We recommend selecting a provider listed below and checking its interoperability category to see how compatibility was verified. Community templates may also be available within 3CX, but these have not completed the same provider interoperability process and are not included in this directory.

Select your country to view available providers. VoIP and SIP Trunk Providers wishing to become listed can apply here.