VoIP caller ID: which number people see when you call from a browser

What number does the person see when I call from a browser?

One of four things, and the service decides which: a shared number it uses for many callers, a number it gives or rents you, your own mobile once you have proved it is yours, or, on app-to-app calls, your account in that app instead of a phone number. I read each service's caller ID and help pages on November 1, 2026.

Yolla's web-calling page doesn't say whether browser calls also show your number, and I found no page describing how Yolla checks it. Call2Friends documents caller ID only for paid calls, so I treat what its free call shows as unknown.

Rules explain the pattern. US carriers and interconnected VoIP providers must pass the caller's number along with every call they send to the phone network ^[14] and authenticate it with STIR/SHAKEN on their IP networks ^[15]. Twilio's SIP trunking, which links calling systems to the phone network, accepts only a caller ID that matches a Twilio number on the account or one the customer verified ^[16]. That is why a service with nothing of yours verified sends its own number.

Shared numbers: why people may not answer or call back

A shared number costs nothing extra, but the person sees a number they don't know, and a call back to it doesn't reach you. That suits a quick call to someone who expects it. It fails with a clinic, a landlord or a courier who may need to reach you later.

PopTox shows the same number for every caller ^[1]. TwinPhone uses a shared number until you rent or verify one, and says a call back to it does not reach you ^[2]. If I must use a shared number, I do three things:

• Warn them first by text or email, so an unknown number has a reason to be answered.
• Leave a number that reaches me if I get voicemail.
• Skip it for anything that rings back later, from a clinic to a job interview.

Emergency calls are a separate problem: TwinPhone, Yolla and free Google Voice can't call emergency numbers at all ^[17][18][19]. My guide to emergency calls without a phone covers what does work.

How to show your own number on a browser call

Verify it with a code. Call2Friends, Globfone and TwinPhone send a code to your mobile and show the number only after you enter it. Call2Friends does this for free on paid calls, Globfone sends the code by text or call, and TwinPhone charges $1 a month ^[8][9][2].

1. Open the caller ID setting: the Caller ID option in your Call2Friends account settings ^[8], a paid add-on in TwinPhone ^[2].
2. Type your mobile with + and the country code; US and Canadian numbers are +1 and ten digits ^[20].
3. Enter the code the service sends you. Call2Friends won't set a caller ID without SMS verification, because the feature "can provoke Caller ID spoofing which is against the law" ^[8].
4. If you have several numbers, pick one before dialling; TwinPhone's "Call from" menu remembers the choice ^[2].

Abroad, it may not stick: Call2Friends warns that some countries' regulators oppose or don't support caller ID changes ^[8], and Dialpad, a business phone service, marks a country restricted when its lines there lack domestic caller ID, emergency calling or in-country toll-free calls ^[21].

To hide your number instead, US carriers must treat *67 before the number as a request to withhold it on interstate calls, a rule that doesn't apply to 911 ^[14]. Google Voice takes the same prefix on US numbers or hides every call with an Anonymous caller ID setting ^[22]; Call2Friends can't hide numbers at all ^[8].

Renting a number: one caller ID for calls out and calls in

A number from the service does both jobs: it shows on your outgoing calls and rings in your browser when someone calls back, while your mobile stays private. Google Voice gives one free in the US ^[23], and TextNow in the US and Canada ^[24]. Outside those two countries, every number I found costs a monthly fee.

Three caveats. Banks, payment apps and Telegram often refuse virtual numbers, as TwinPhone's own page warns ^[3]; why apps turn VoIP numbers down explains the checks. TwinPhone also charges $0.02 a minute for incoming calls and rings only if your balance covers a minute ^[34]. And it has no free tier: credit starts at $10 ^[17][35].

How do I receive calls on my computer?

Get a number that rings in a browser and keep its tab open. Google Voice, TextNow and TwinPhone (with a rented number) ring in the browser; WhatsApp Web rings only for calls from other WhatsApp users. Services built for outgoing calls, such as Yolla, can't receive calls ^[36].

Microsoft Phone Link and carrier Wi-Fi Calling can also ring a computer, but through your phone or mobile line, not a browser tab ^[39][40]. I compare them in my notes on calling from a computer.

Frequently asked questions

Related reading

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  How to run a WebRTC leak test, read the result and see who gets your IP on a browser call, with the Chrome, Firefox, Brave, Safari and VPN settings I checked.

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  A 5 minute free call is usually a 2–3 minute daily allowance or a one-off trial. I checked which free trial calls online still exist, their limits and catches.