SIP.US Cloud SIP Trunking review
A configurable SIP trunking service for PBXs, Teams, and North American calling.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
SIP.US Cloud SIP Trunking connects SIP-enabled PBXs and legacy PBXs with SIP gateways to the public switched telephone network. It is designed for businesses that need inbound and outbound calling, configurable channels for simultaneous calls, and U.S. or Canadian telephone numbers. The service also supports toll-free DIDs, U.S. number porting, Enhanced DIDs with Nomadic E911, and real-time call-detail records. Its web-based control panel covers trunks, numbers, provisioning, billing, and call records.
The pricing structure is built around channel-based service. Month to Month includes unlimited outbound calling to the contiguous United States and Canada, unlimited inbound calling to local numbers, and no SIP trunk setup fee. Yearly Plans also include unlimited outbound calling to those regions and no SIP trunk setup fee, with annual-plan pricing shown per channel per month. SIP.US offers a free trial with 60 minutes of calling, while the service itself is paid rather than a perpetual free-plan product. Destinations outside the included regions can use per-minute billing.
Integration and network features are the main reasons to choose SIP.US. Microsoft Teams is supported directly, while Asterisk and FreeSWITCH are listed as compatible platforms. Administrators can configure TLS and SRTP for encrypted SIP and voice traffic, connect multiple SIP gateways, and use SRV-based failover. Choose SIP.US when an existing PBX environment needs North American calling, self-service administration, porting, emergency calling, and operational visibility. It is a less direct fit for organizations seeking a perpetual free plan, a non-web administration experience, or calling requirements centered outside the included U.S. and Canadian regions.
SIP.US Cloud SIP Trunking pros and cons
- Where it wins
- Configurable channels support simultaneous calls and PBX connectivity.
- Self-service controls cover trunks, numbers, provisioning, billing, and records.
- Includes Teams, number porting, E911, encryption, and failover features.
- Where it doesn't
- The service is paid rather than a perpetual free-plan product.
- Calling outside the contiguous U.S. and Canada can use per-minute billing.
- Legacy PBX deployments require SIP gateways for SIP connectivity.
SIP.US Cloud SIP Trunking fact sheet, pricing and score →
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