Overview

SIP.US is a business-class SIP trunk service provider for IP-PBX systems and analog/digital telephone adapters. Our SIP trunks operate on your own broadband Internet connection, and we offer unlimited rate plans. Our easy setup, Tier-1 network, and powerful self-service SIP control panel have made us the leading on-demand SIP provider. Since 2007, SIP.US has focused solely on SIP Trunking services. Try our service instantly with a free account today in less than 60 seconds.