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SIP Trunking

Leverage your Internet for data and voice. Empower your IP PBX with OnSIP.

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OnSIP trunking comes included with every OnSIP account

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SIP trunking is for businesses that have decided that their communication needs are best met with an on-premise PBX solution and need an Internet Telephone Service Provider to handle their calls to and from the PSTN. SIP trunks are often used with an IP PBX to replace traditional analog circuits or PRIs. Offered as a feature in every OnSIP Hosted PBX account, OnSIP trunking leverages the reliability and infrastructure of the OnSIP platform for optimum performance.

We support all the most popular software PBXs, including Freeswitch, Asterisk, Trixbox, and Fonality. When used in conjunction with OnSIP Hosted PBX, OnSIP Trunking is a great way to integrate off-site extensions with your on-premise PBX solution.

Pay as you go pricing

Unlike other SIP trunking service providers, we do not charge you per channel or trunk. You simply open an OnSIP account, with a minimum fee of $49.95 per month, and then pay as you go for usage. The monthly minimum fee is waived for the first 30 days when you open an account, which means there's no upfront cost for getting started.

Features and services Price
OnSIP Trunking (UDP + TCP) Free with OnSIP account ($ 49.95 / month)
Local Phone Numbers (DIDs) $ 7 setup, $ 2 / mo per number after
Number porting ( LNP ) $ 15 per number. See details
Vanity number request $ 25 per request
Inbound call type Per minute rate
Local 2.9 cents
Toll Free
  • 3.9 cents from the US48 states
  • 9.9 cents from Canada
  • 30 cents from Puerto Rico
  • 20 cents from Hawaii
  • 75 cents from Alaska
  • 9.9 cents from callers with no caller ID
  • An additional 50 cents from payphone calls
OnSIP network 0.5 cents
Outbound call type Per minute rate
US48, most of CA, and 20+ other international destinations 2.9 cents. Please see our standard calling area for all destinations.
OnSIP Network 0.5 cents
International destinations Please see our our extended calling area for all rates.

Instant setup

With OnSIP trunking, you can get started immediately with absolutely no waiting periods. Visit our knowledgebase for walkthroughs and best practices.

Q & A

Question: Answer:
Do you have phone numbers in my region? OnSIP has phone numbers available for customers in almost every region of the United States. Click here to get a real time listing of available phone numbers broken down by state.
Are there any long-term commitments? No. This is a pay-as-you-go service. You may cancel at any time without penalty.
I want to replace my on-premise PBX altogether. Can you help? We recommend considering our award-winning OnSIP Hosted PBX. See our Hosted PBX features here.