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A SIP trunking solution instantly connects your existing PBX or physical phone lines to AVOXI's global VoIP network. Choosing AVOXI as your international SIP trunk provider ensures top call quality, secure failover routing, and amazing call rates worldwide. In fact, customers often reduce international call costs as much as 50% with business SIP trunking from AVOXI. Get a SIP trunk DID number and instantly start making outbound calls with custom caller ID and managing inbound calls. Every SIP trunk DID number includes 20+ features like custom caller ID, call recording, global call forwarding, IVR and many more at no extra cost. Buy SIP trunks with no setup fees or minimum contracts and port numbers for free. Try global SIP trunk solutions for 30 days risk-free.

Get the Most from Your International SIP Trunk Provider

There's a reason so many international businesses trust AVOXI with their global SIP trunking needs. The benefits of choosing AVOXI include:

  • SIP trunk DID numbers start as low as $4.49 per month.
  • Set up custom caller ID for outbound calls with any SIP trunk DID number.
  • Connect trunks from multiple server locations to ensure best voice quality.
  • Start small and buy SIP trunks online or add unlimited SIP lines anytime.
  • Earn $25 - $1,000 per number when you port existing numbers to AVOXI.
  • Data centers across America, Africa and Asia ensure reliable SIP failover.
  • Enjoy 15 days of free call recording or set up extended plans as needed.
  • Business SIP trunk customers receive a dedicated account manager and 24/7 technical support, available in English and Spanish.
  • Global SIP trunking includes 20+ features like global call conferencing and IVR at no additional cost! Try business SIP trunking for 30 days risk-free.
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See How Easy VoIP SIP Trunking Can Be

Setting up local and international SIP trunking is quick and easy. If you are simply looking for an inbound SIP trunk with standard outbound calling and custom caller ID, you can purchase toll free or local DID numbers in the Online Shopping Cart. For a complete list of VoIP SIP trunk plans and global call termination rates, contact us today! Once your service is set up, you can buy SIP trunks online anytime. There are no setup costs, minimum contracts, or number porting fees with AVOXI.

Why International Businesses Choose AVOXI

Over 5,000 companies around the world trust AVOXI with their business SIP trunking needs. No matter where you need service, direct interconnects with Tier 1 carriers worldwide allow AVOXI to deliver enterprise level-call quality at the most globally competitive rates. Our cloud SIP trunking customers expect the best in reliability and value-added. When you choose AVOXI as your global SIP trunk provider, your benefits include:

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Reduced Cost

Reduce corporate call costs as much as 50% with a SIP trunk solution customized for your specific business needs.

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Global Reliability

Data centers across America, Africa, and Asia provide multiple layers of SIP failover to ensure maximum service uptime.

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Customer Focus

Every SIP trunk solution includes a dedicated account manager focused on the specific needs of your business.

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Amazing Call Quality

Over 99% of calls handled by AVOXI receive MOS scores above 3.5, the international standard for "excellent" voice quality.

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Advanced Features

Customize 20+ VoIP SIP features, included at no additional cost.

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Fast Deployment

Deploy VoIP SIP trunks anywhere in minutes.

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Flexible & Scalable

Add up to 480 channels per SIP trunk as your business grows.

24-7 Support (17)

Expert Support

Get 24/7 technical support in English and Spanish.

See Why So Many Businesses Choose AVOXI

Easily Connect Your SIP Trunk PBX to the Cloud

Your international SIP trunk solution includes access to AVOXI Core. This SIP trunking PBX connects you to the cloud and allows you to customize 20+ VoIP SIP features at no extra cost. Activate custom caller ID, set up dynamic call forwarding rules, buy SIP trunks online, manage your SIP trunk call recordings, view detailed analytics and more from your User Interface. AVOXI Core can be used as your stand-alone SIP trunk PBX or easily integrate with your existing business phone system.

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Custom Caller ID

Call Forwarding

Simultaneous Ringing

Voicemail to Email

IVR / Virtual Attendant

Call Grouping

Time of Day Routing

Global Conferencing

Hosted Call Recording

Fax to Email

Call Screening

Mobile User Interface

Enjoy Dramatic Savings with Global SIP Trunking Solutions for Business

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Reduce your corporate telecom costs by adding enterprise SIP trunking to your existing system. Easily integrate your in-house or hosted PBX equipment with no additional capital investment.

  • Designate SIP trunk servers from Hong Kong or US data centers.
  • Manage and configure your VoIP SIP trunks from the easy to use online platform.
  • Reduce corporate call costs as much as 50% with business SIP trunking to over 150,000 destinations.

SIP Trunk DID Numbers for International Calling

With local partnerships and Tier 1 carrier interconnects around the world, enjoy top enterprise-level call quality for the best rates worldwide.

Get local and international SIP trunk DIDs from 120+ countries and 2,500+ cities. Popular service areas include:

Asia Pacific


North America





British Virgin Islands


Costa Rica

Dominican Republic




Puerto Rico

Trinidad and Tobago

United States

US Virgin Islands





Czech Republic












South Africa

South America






Have Questions About Business SIP Trunking or SIP DID Numbers?

Contact us today to learn more, schedule a free demo, or to set up VoIP SIP trunking for 30 days risk-free!

How to Set Up Business SIP Trunking

If you simply need inbound SIP trunking with a DID for incoming call management and standard outbound calling, you can set up service online by securing a number in the Online Shopping Cart. To get a complete list of our global termination rates and to view business SIP trunk plans and pricing designed for your specific needs, contact us today!

Business SIP Trunk Pricing

Global SIP trunk pricing depends on where your calls take place, how many SIP channels your require, and your expected call volumes. SIP trunk DID numbers in popular service areas like the US, Canada, Australia, UK, Germany, Singapore, Japan, Switzerland, Japan, and several more start at just $4.49 per month. These numbers include complete inbound SIP trunking and standard outbound calling with custom caller ID, as well as call rates below other top business SIP trunk providers. Contact us today for your free quote and a complete list of global call rates.

There are no setup fees or cancellation costs, and you can try your service for 30 days risk-free.

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Get Complete Pricing

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Buy SIP DID Numbers

Buy SIP trunk numbers online. After your purchase, an AVOXI specialist will contact you and ensure your service is working according to your preferences. You can change your service settings online anytime.

SIP Trunking Solution Case Study - Customer Success

Award-winning Resort Integrates PBX SIP Trunking Solution to Scale Global Business

Your old phone system doesn't have to hold your business back. Learn how an award-winning Caribbean resort used a PBX SIP trunk solution to support their growing call traffic while dramatically reducing call costs.

Business SIP Trunk Case Study - Solutions Brief

Frequently Asked Questions About Business SIP Trunking

How many concurrent calls can I make per SIP trunk?

Business SIP trunking supports as many as 480 channels per trunk. There is no limit on how many SIP trunks you can provision to a single account. If you are not sure how many channels you need, we'd love to help! Contact us today to learn more.

Does AVOXI offer unlimited VoIP SIP trunk plans?

AVOXI provides customized business SIP trunk solutions to best meet each customer’s specific needs. If you are interested in an unlimited SIP trunking plan, contact a VoIP SIP specialist today.

Do I buy SIP trunks for each country I make calls to?

No. Every SIP trunk solution from AVOXI includes outbound calling with global termination. You can also make outbound calls worldwide by simply purchasing a SIP DID number in the Online Shopping Cart.

How long does it take to set up my global SIP trunks?

AVOXI activates new business SIP trunk accounts within business 24 hours. In most cases, international SIP trunking can be activated the same day. AVOXI customers can upgrade or downsize their SIP trunk solution anytime.

Can I buy SIP trunks online?

Yes. Once global SIP trunking has been activated, you can add or remove SIP trunks from the AVOXI Core User Interface as your business needs change.

What else can AVOXI do to support my business?

In addition to the best international SIP trunking solutions for business, popular services from AVOXI include VoIP 800 Numbers and Contact Center Solutions.