SIP Trunking is live on Bandwidth Build

Bandwidth Build now supports SIP Trunking. Bring your own infrastructure and route calls exactly where you need them, without leaving your trial.

Manage SIP trunks and routing configurations directly in the app or through the API. Set up routing to IPs, phone numbers, domains, or a SIP URI. Do it in a few clicks or a few lines of code.

Building a voice AI agent? SIP Trunking on Build gives you a direct path onto the Bandwidth network. Because we own and operate our network end to end, your AI agent gets low-latency, reliable SIP traffic without an extra hop through third-party infrastructure.

The Bandwidth CLI covers the full setup: create realms, credentials, and voice configuration alongside your trunk, all from the command line.

SIP Trunking runs on the same free trial credits as everything else in Build, alongside inbound and outbound calling, voice AI applications, IVR and call flows, and call recording and transcription. It’s all built on the Bandwidth Universal Platform.

This is for US phone numbers only. Set it up in the app or through the Bandwidth CLI.

Get started at bandwidth.com/build-sign-up.