The World Has Gone Virtual. Your Phones Should Too.

It’s time to modernize your communications.

Free SIP Trunk in 60 Seconds

call detail records
SIP Phone

On-Demand, Cloud SIP Trunking Service from SIP.US

Today’s businesses need flexible communications and key integrations, such as voice-enabled Microsoft Teams. SIP.US provides leading SIP trunking services built around your business operations so you can get started quickly, be self-sufficient,  and have it your way - all while paying less for greater peace of mind.

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Fast Set-Up

In seconds, we can implement your SIP trunk. Use our online interface to add new numbers and SIP trunk channels on-demand in minutes, and use them immediately. 

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Easy-to-Use Control Panel

Our powerful, self-service control panel is fully-automated, giving you complete control to easily manage your SIP trunks, telephone numbers, provisioning, billing, and call data records.

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Ultimate Flexibility

SIP.US doesn’t require you to do it our way. Choose your Internet provider and bandwidth, phone, and carrier. Our responsive support team is here to help when you need it.

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Predictable Pricing

Our SIP service is prepaid with no contract at a rate of $24.95 per month per unlimited channel. Add channels or cancel at any time with zero fees or penalties. Contact us for additional options.

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Microsoft Teams Integrations

SIP.US can elevate Microsoft Teams by connecting your SIP trunks with Teams so you get enterprise voice and collaboration capabilities in one, unified platform.

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Business SMS

Streamline your business communication with our efficient Business SMS solution, enabling instant, secure, and convenient messaging with customers and clients.

We Take Reliability and Security Seriously

We built in features to make sure your phone system works perfectly and with the highest quality, uptime, and security. 

  • Tier-1 Redundant Network

    SIP.US utilizes only Tier-1 upstream providers to route our SIP traffic to ensure you get the highest quality voice experience and a redundant network for outstanding reliability. 

  • Toll Fraud Protection

    We protect our VoIP SIP trunks from fraudulent activity by using automated systems to detect fraud and protect your account, even if your on-premise systems are compromised.


Experience Is Everything

We are pioneers in the communications industry with decades of telecom experience. Our team has a deep understanding of SIP trunking and related IP technologies, giving us the unique ability to build the best, most intuitive online control panel in the industry.

Supported Products

We work with any SIP-based PBX or legacy PBX with a SIP gateway, including:

Customers Who Love Us

Simple Interface.

We were able to get our systems up and running with SIP.US in a matter of minutes using the simple online interface.

Matt Harrison

Elevate Audio Visual

Low cost and good!

It’s easy to be low cost, but it’s a lot harder to be low cost AND good! In my opinion, SIP.US should be on anyone’s short list of primary providers.

Michael Dodds


All the tools I need.

The SIP.US Control Panel gives me all the tools I need to add, change and delete phone numbers. I can even order all the DIDs I need and set them up instantly. I love having access to these self-service tools, but I know the support team is also there if I need additional help.

Colin Cook

Thimble River

Up and running in minutes.

We are able to get our Switchvox systems up and running with SIP.US in a matter of minutes using the simple online interface.

Mike Crockett

BITS Technology

Quality support, low price.

I wasn’t sure how to configure my Asterisk system to work with SIP.US. The SIP team was able to remotely access my system and set it up for me. I didn’t expect that level of support for such a low price.

Greg Galvin

The Galvin Law Group

Fast and easy set-up.

I don’t have any experience with SIP trunking, but connecting my Asterisk PBX to SIP.US was fast and easy.

Eddy Pareja

Sangfroid Web Design

Excellent support.

The reason we moved most of our VOIP to you is because of your excellent support. We moved from another provider but your support makes the extra money well worth it.

Brian Marshman

CEO BMI SmartCloud