SIP Trunking built for US businesses

United States

Everything from Hosted PBX to SIP trunks, DIDs and VoIP apps, self-served and running in as little as 20 minutes — no sales call required.

4.8

Trusted by

0+ users

One VoIP provider, every service you need

Trunk.us bundles SIP trunking, hosted telephony, and numbers into a single, certified platform.

Cloud PBX that gets US businesses live in as little as 20 minutes — remotely managed, secure, and resilient, with zero hardware to babysit.

SIP trunks certified with 3CX, Asterisk, Avaya, Cisco, FreePBX and Grandstream — carrier-grade call quality without a carrier-grade contract.

DIDs from any US area code, or any country your customers call from — manage every number from one dashboard.

IP phones from Cisco, Htek, Poly, Snom and Yealink, pre-configured for our Cloud PBX before they hit your desk.

Faxes as PDFs in your inbox — no machine, no toner runs, same US fax number without the hardware.

0K+

Customers

0M+

Processed Mins / Month

0K+

DID numbers

Certified & compatible with

FAQ

The essentials on SIP trunking, and why businesses in United States pick Trunk.us to run it.

Still need help?

SIP (Session Initiation Protocol) replaces a physical phone line with a data connection you already have — same call, no copper.

Tell us about your current setup and call volume — we'll follow up with a quote or a demo, whichever fits.