You can use any other provider or VoIP solution.

This could also be a 3rd party phone system/PBX.

It's always unlimited incoming minutes when we send calls to VoIP.

You just provide the info on where to send the calls, we'll take care of the rest.

Illustration of puzzle pieces connected in a circle, each piece containing icons representing different integrations such as a globe, gear, and database.

Integrate with any 3rd party provider or system

  • We support integration with major VoIP providers like FlowRoute, Twilio, 3CX, and others.
  • We also work with on-premise solutions like Asterisk, FreePBX, or other SIP-based systems.
  • Flynumber is compatible with any VoIP solution that supports the SIP or IAX protocols.
Illustration of a cloud with interconnected lines and devices, representing VoIP and cloud-based communication.

Popular VoIP providers we send calls to

Logo of Twilio, a cloud communications platform providing APIs for messaging, voice, and video services.
Twilio
Easily forward your FlyNumber to their SIP services. Sending SIP to Twilio External Link Icon.
Logo of Callcentric, a VoIP provider offering internet phone services and SIP trunking.
Callcentric
Reliable VoIP services and SIP URI forwarding. SIP Forwarding for Incoming Calls External Link Icon.
Logo of Telnyx, a VoIP and communications platform providing SIP trunking and messaging services.
Telnyx
Flexible SIP trunking solutions for businesses. SIP URI Calling External Link Icon.
Logo of Linphone, an open-source VoIP application for voice and video calls.
Linphone
A free and open-source softphone for VoIP services. Free SIP Service External Link Icon.
Logo of Flowroute, a VoIP provider known for delivering voice and messaging services.
Flowroute
Secure and scalable SIP trunking services. Create an Inbound Route with your Preferred PoP External Link Icon.
Logo of Voxbeam, a wholesale VoIP provider offering global communication services.
VoxBeam
Global wholesale VoIP services and SIP trunking. Voxbeam Help Center External Link Icon.
Logo of OnSIP, a cloud-based business VoIP service provider offering hosted PBX and SIP services.
OnSIP
Cloud-based business VoIP services with hosted PBX and SIP options. Inbound Bridge External Link Icon.
Illustration of colorful buttons arranged in a circle with hands pointing to different options, symbolizing multiple choices or decisions.
Any SIP address
As long as your VoIP provider accepts incoming traffic we can send the calls there, just give us the SIP address.

AI Voice Platforms

Connect your FlyNumber to AI voice agent platforms like VAPI, ElevenLabs, Retell, and Bland AI for automated call handling.

These platforms let you build AI-powered assistants that answer calls, schedule appointments, and handle customer inquiries around the clock.

With VAPI for example, you point your FlyNumber to a SIP address like +{your_number}@{credential_id}.sip.vapi.ai — no SIP registration required.

Check out our VAPI setup guide for step-by-step instructions.

Illustration of cloud-based AI voice communication

Use our optional cloud PBX alongside your VoIP solution

Setting the FlyNumber to a voip solution with our PBX is a powerful combination.

Forward the calls to a regular phone number as a "back-up" to your VoIP solution.

Send calls to multiple SIP/VoIP addresses sequently or at the same time.

Block, record or re-route calls around your voip solution.

Use our PBX to create SIP credentials for incoming/outgoing calls.

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3rd party PBX software we work with

Logo of Asterisk, an open-source software implementation of a telephone private branch exchange (PBX).
Asterisk
Asterisk External Link Icon is the go-to framework for building powerful communications applications, from IP PBX systems to VoIP gateways.
Logo of FreeSWITCH, an open-source telephony platform designed to route and interconnect communication protocols.
FreeSWITCH
FreeSWITCH External Link Icon handles large-scale telephony applications easily, it's flexible and uses LUA scripting.
Logo of 3CX, a software-based private branch exchange (PBX) that works with popular SIP trunk providers.
3CX
3CX External Link Icon is very popular among businesses and easily integrates with SIP trunks and desktop VoIP phones.
Logo of Kamailio, an open-source SIP server for large-scale VoIP and real-time communications.
Kamailio
Kamailio External Link Icon handles high-performance SIP routing, making it ideal for large-scale VoIP and real-time communication deployments.
Logo of FreePBX, a popular open-source GUI for Asterisk.
FreePBX
FreePBX External Link Icon is a user-friendly GUI for managing Asterisk-based PBX systems.

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  • Customer service 7 days a week.
  • We've been in business for well over a decade.
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