Answer your FlyNumber on any SIP app or desk phone with FlyNumber SIP, and call out with it too.

Forward calls to any regular phone number in the world for a low per-minute rate.

Already use a VoIP provider? Send calls to your own SIP address.

Can't pick up? Let a built-in AI voice agent answer.

Change your Call Handling "on the fly" -pun intended- from your FlyNumber panel.

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Make and receive calls with FlyNumber SIP

Set your number to FlyNumber SIP and it rings on any SIP app, desk phone or PBX, on up to 5 devices.

Incoming calls are included with the number: unlimited incoming minutes*. Outgoing calls show your FlyNumber as the caller ID and are billed per minute.

Voicemail and encrypted calls are built in. No monthly fee for FlyNumber SIP itself.

Set up FlyNumber SIP
Incoming call Rings every registered device
🇺🇸
+1 307 429 0155 United States · Sheridan, WY
Included in the number's monthly rate
Outgoing call Dial out from any SIP app or desk phone
Caller ID +1 307 429 0155
🇺🇸 Your number
Billed per minute from your prepaid balance
FlyNumber SIP Make and receive calls
Built-in VoIP
Your own SIP credentials — works with any SIP app or desk phone.
Username13074290155
Password••••••••••
SIP serversip.flynumber.com
DevicesUp to 5
Phone, desktop and desk phone ring together
VoicemailBuilt in
Picks up when no device answers

Or let an AI voice agent answer

Set a number to AI voice agent answers and a built-in AI voice agent takes the call.

It answers questions, takes messages and transfers callers to your phone, following rules you write in plain language.

$0.10 per minute of AI conversation. No monthly fee for the agent.

Create an AI voice agent How it works
Speaks your callers' language Greeting in 16 languages. The agent switches to the caller's.
English Español Français Deutsch العربية עברית हिन्दी 中文 日本語 한국어 Português +5 more
How a call goes Northside Plumbing
Caller dials🇺🇸 +1 312 555 0147
Recorded greetingHi, you've reached an AI assistant.
Agent saysThanks for calling Northside Plumbing. How can I help?
Acts on the rule that matches
1.
The caller asks which areas you coverJust answer
2.
The caller has a burst pipeTransfer to +1 773 555 0162
3.
The caller wants a quoteTake a message
4.
The caller says they're doneEnd the call
If it can't take the callGoes to voicemail
New messageBy email and in the panel
Just now
Sam Rivera Needs a quote to replace a water heater. +1 312 555 0190

Five ways to use your FlyNumber

Watercolor illustration of a desktop computer, server, smartphone, tablet and laptop, the kinds of devices you can register with FlyNumber SIP.
FlyNumber SIP
Your own SIP credentials from FlyNumber (SIP is the standard that VoIP apps and desk phones use). Register any SIP app, desk phone or PBX, up to 5 devices, and make and receive calls, with voicemail built in. Incoming calls are included with your number's monthly rate; outgoing calls are billed per minute from your prepaid balance. Set up FlyNumber SIP.
Watercolor illustration of a cheerful bird holding up a smartphone, for the AI voice agent that answers your calls.
AI voice agent answers (beta)
A built-in AI voice agent picks up for you. It answers questions from what you tell it, takes messages and transfers callers, for $0.10 per minute of AI conversation with no monthly fee. How AI voice agents work.
Illustration of a blue telephone keypad, symbolizing dialing or entering numbers.
Forward to a Phone Number
Send calls to any mobile or landline, anywhere in the world, at a low per-minute rate from your prepaid balance. How forwarding works.
Illustration of a telephone handset next the word VoIP.
Forward to SIP / VoIP Address
Already use a VoIP provider, PBX, softphone service or AI voice platform? Point your FlyNumber at its SIP address and calls arrive there with no per-minute charges on incoming calls: unlimited incoming minutes*. Set your FlyNumber to VoIP, connect an AI voice platform like VAPI or ElevenLabs, or see how it works with any VoIP solution.
Illustration of a cloud, representing cloud services or cloud computing.
Cloud Phone System (optional)
Need a voice menu, ring groups, queues, business hours or call recording? Add our cloud phone system for $14.95/month flat, one price for your whole account, with up to 30 users. Usually you don't need it: see when it's worth adding.

Note

Switch between them any time in your panel. A sixth option, Park the Number, stops the number ringing anywhere (callers hear busy) with no call charges.

Technical Details

  • Forwarding to a regular phone number needs no internet, VoIP or data on the receiving phone. It works like a normal phone call.
  • You see the caller-ID of the person calling your FlyNumber.
  • Call out with FlyNumber SIP and your FlyNumber is the caller-ID. It's encrypted (TLS and SRTP) and rings up to 5 devices per number.
  • If a caller withholds their number, a forwarded call still connects and shows your FlyNumber as the caller ID. Details.
  • Detailed call logs, incoming and outgoing, with the cost of each call.
  • Read about the difference between forwarding a call and setting calls to VoIP.
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Frequently Asked Questions

Do I need internet or data to receive forwarded calls on my phone?

No! When using regular phone number forwarding, the receiving phone doesn't need internet, VoIP, or data - it works just like a normal phone call. Internet is only needed if you answer with FlyNumber SIP or your own VoIP.

How can I forward calls to multiple team members at once?

With FlyNumber SIP one number can ring up to 5 devices, all at once or one after another, with no phone system needed. For bigger teams, add the phone system: a Ring Group rings up to 3 destinations at the same time, and a Queue handles unlimited destinations with round-robin routing and music on hold.

Can I set different forwarding rules based on business hours?

Yes, with the phone system. Use the Time Router module to create schedule-based routing. For organization-wide schedules, you can also set up Time Schedules to manage availability for all team members.

How do I record calls when forwarding to my phone?

Call recording is a phone system feature. Use the Call Recorder module in your call flow, enable recording in your app settings, or use on-demand recording with feature codes. Recordings can be delivered by email, or to Google Drive, Dropbox, OneDrive or FTP/SFTP.

What happens if nobody answers a forwarded call?

With FlyNumber SIP, turn on voicemail and the caller can leave a message after the ring timeout; you get an email and the message lands in the Voicemails inbox in your panel. With the phone system you can also send unanswered calls to its voicemail module, forward them to another destination, or use a Queue. Every call, answered or not, shows in your call logs.

Can I connect my FlyNumber to an AI voice agent?

Yes, in two ways. FlyNumber has AI voice agents built in (beta): set the number's Call Handling to AI voice agent answers, and an agent you set up in your panel answers questions, takes messages and transfers callers, for $0.10 per minute of AI conversation. Or bring your own AI voice platform: set your FlyNumber to Forward to SIP / VoIP Address and point it at the SIP address of platforms like VAPI, ElevenLabs, Retell and others. Because that counts as VoIP there are no per-minute charges on incoming calls: unlimited incoming minutes*.

Can I transfer calls between different forwarding destinations?

Yes, with the phone system you can transfer calls using feature codes. Set up attended transfers to speak with the recipient first, or use unattended transfers for immediate forwarding.

Can I make outgoing calls with my FlyNumber?

Yes. Set your number to FlyNumber SIP or use the phone system and you can call out from any registered app or device, with your FlyNumber as the caller-ID. Outgoing calls are billed per minute from your prepaid balance at the rates on our Rates page; incoming calls stay included. Some number types restrict outbound calling due to local regulations.

Do I get voicemail?

Yes, voicemail is built into FlyNumber SIP, no phone system needed. Turn on "Take a message when nobody answers" for the number, upload or record a greeting, and get each message by email (with an optional .wav attachment) and in the Voicemails inbox in your panel. Numbers set to forward to a phone number or to your own VoIP don't get FlyNumber voicemail; the phone system has its own voicemail module.

How some of our users utilize call forwarding

Illustration of a blue bird standing in front of a chalkboard with the word 'Examples' written on it, symbolizing teaching or presenting examples.
  • An entrepreneur forwards a business FlyNumber to their mobile phone.
  • You have friends/family overseas and forward a local (to them) FlyNumber to your mobile, wherever you are.
  • A freelancer sets a FlyNumber to FlyNumber SIP so it rings on their laptop and phone at the same time, and calls clients back with the FlyNumber as caller-ID.
  • A repair shop sets a FlyNumber to a built-in AI voice agent that answers questions, takes messages and transfers urgent calls to the owner's mobile.
  • A startup points a FlyNumber at its own AI voice platform over SIP.

Forum topics on call forwarding

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*Unlimited incoming does not apply to toll-free or metered numbers. AI voice agent conversations are billed at $0.10 per minute.