Use any VoIP provider or your own solution


Cloud with a blue phone icon under it

Unlimited incoming minutes when using VoIP


  • You'll always have the option of taking your FlyNumber and setting it to a different VoIP / SIP provider. They come in many shapes and forms, apps to servers and everything else in-between.
  • If your VoIP provider has a SIP address (URI) and allows for incoming traffic, we can send the calls there.
  • You're not limited to just "VoIP" providers, if you have an Asterisk, or a FreePBX setup for example and want to send the calls there - we can do that too.
  • Anytime you set a FlyNumber to a VoIP solution, you only pay for the FlyNumber, incoming calls are unlimited.
  • Keep in mind we have our own cloud phone system which acts as a VoIP provider in and of itself, you can create SIP accounts for incoming and outgoing calls as well as integrate with your own VoIP solution
  • It's also important to note your FyNumber is a "DID phone number" (Direct Inward Dialing), many use that term when looking for a phone number for their VoIP phone number needs

collage of colorful speech bubbles

Forum topics on VoIP



icon with list and plus sign

Recent Blog Posts


A browser with green code icon coming out of open brown box

Get a DID / Virtual phone number for your open source software


  • Set your FlyNumber to any open source VoIP setup and its unlimited incoming minutes - you'll just pay the monthly price for the DID phone number itself
  • Asterisk
  • Asterisk is a highly customizable, open-source VoIP software that provides a full-featured telephony platform. By connecting your FlyNumber to Asterisk, you can take advantage of the platform's flexibility and wide range of features, including PBX, VoIP gateway, or conference server capabilities. Asterisk supports various voice codecs and protocols, such as SIP, IAX, and H.323, making it easy to integrate with FlyNumber and create a seamless communication solution. [Sample config]
  • FreePBX
  • FreePBX is a web-based, open-source graphical user interface (GUI) that manages and configures the Asterisk telephony server. By setting up your FlyNumber with FreePBX, you can easily manage VoIP systems through its user-friendly interface for configuring extensions, IVRs, call routing, and more. With features like call recording, voicemail, and conference bridging, FreePBX is a popular choice for small and medium-sized businesses looking to connect their FlyNumber to a powerful VoIP system.
  • FreeSWITCH
  • FreeSWITCH is a scalable, open-source VoIP platform that can be connected to your FlyNumber to create a robust communication solution. Supporting a wide range of communication protocols, such as SIP, WebRTC, and H.323, FreeSWITCH can be used for various applications, including PBX, call centers, video conferencing, and softswitching. Its high performance, stability, and flexibility make it a suitable choice for businesses of all sizes looking to integrate their FlyNumber with a versatile VoIP solution.
  • Kamailio
  • Kamailio is an open-source SIP server that offers robust and scalable VoIP solutions, with a focus on high performance and security. By connecting your FlyNumber to Kamailio, you can leverage its capabilities as a SIP proxy, registrar, and load balancer. Compatible with various VoIP platforms like Asterisk and FreeSWITCH, Kamailio is suitable for large-scale deployments and can handle thousands of concurrent calls, making it a popular choice for carriers, ITSPs, and large VoIP service providers using FlyNumber.
  • FusionPBX
  • FusionPBX is an open-source, web-based interface for managing FreeSWITCH installations. With the ability to connect your FlyNumber to FusionPBX, you can access a user-friendly GUI for setting up and managing various VoIP features, such as call routing, IVR, voicemail, and call recording. Designed for high customization, FusionPBX allows administrators to create multi-tenant PBX systems, call centers, or other tailored VoIP solutions, making it an ideal choice for businesses looking to integrate their FlyNumber with a flexible and powerful VoIP platform.

Red phone and blue cloud connecting to green voip speech bubble

Some common providers


  • Here's a short list of providers we can "easily" set the virtual phone number to, meaning we just need the username as we have their server info on file
  • CallCentric
  • Callcentric is a Voice over Internet Protocol (VoIP) service provider that offers a range of telecommunication solutions for businesses and individuals. Established in 2000, the New York-based company has gained popularity for its flexible and feature-rich services that cater to diverse communication needs.
  • VoipBuster
  • VoipBuster is a widely recognized service that offers free calls to landlines in several countries and competitive rates for other destinations. By linking your FlyNumber DID with VoipBuster, you can enjoy seamless communication with clients, customers, or friends in countries where free calling is available.
  • VoipDiscount
  • VoipDiscount provides low-cost international calling rates to a vast range of countries, making it an ideal choice for businesses with a global reach. Connect your FlyNumber DID to VoipDiscount to take advantage of their affordable rates and maintain a local presence in your target markets.
  • Full list of "Easy Config" VoIP Providers

Sign Up Now