How calling a phone from your browser actually works
Your browser captures your voice using WebRTC, which is already built into it. We resolve the number to its country and band, price it, and hand the call to a telecoms carrier that puts it onto the ordinary phone network. Their phone then rings like any other call, which is why the person you are calling needs no app, no account and no internet.
What happens between typing and ringing
- 01
Your browser becomes the handset
Modern browsers carry WebRTC, a built-in way to send live audio. Give the tab permission to use the microphone and it is doing the job a handset does: capturing your voice and playing back theirs. There is nothing to install because the capability already shipped with the browser, and it is the same technology behind video calls you have already made.
- 02
We read the number and price it before anything happens
The digits decide everything. A routing table resolves which country the number belongs to and which band it sits in, landline, mobile, freephone or service, and that resolves the price. You see the exact per-minute figure before you press call, not an estimate and not a country average.
- 03
A carrier puts the call onto the ordinary phone network
Your audio reaches us, and we hand the call to a telecoms carrier that has an agreement with the network the number lives on. That handover is the part you are paying for. From there it travels the same wires and towers as any other call.
- 04
Their phone rings like any other phone
This is the part that matters and the part people do not expect. The person you are calling needs no app, no account and no internet connection. Their phone rings normally, because by the time the call reaches them it IS a normal call. A landline in a village with no data coverage works exactly as well as a new smartphone.
Why this is not a messaging app
WhatsApp, FaceTime, Telegram and Messenger all place calls over the internet, and they are free, and for calling another person who already uses them they are the right answer. They reach people, though, not numbers. Both ends need the same app, a smartphone and a data connection.
Most of the calls people actually need to make from abroad are to things that are not people: a bank’s fraud line, an embassy, an airline, a landlord, a tax office, a hospital ward. None of them is going to install an app to take your call. That is the gap this fills, and it is the same job Skype Credit did before it closed in May 2025.
What it cannot do
It cannot reach emergency services. Not 911, not 999, not 112, not any equivalent, and it cannot report your location to an operator. Keep a mobile or landline for emergencies. Most mobiles dial emergency numbers even with no SIM and no credit.
It cannot receive your bank’s security codes. Many institutions deliberately refuse to send two-factor codes to internet phone numbers. That is true of this whole category rather than of us specifically, so keep an ordinary mobile number reachable for codes.
It cannot fix a bad internet connection. The first half of the journey runs over your connection. A weak one sounds weak, which is the honest trade for needing no SIM and no mobile signal.
What it costs
Prepaid credit, drawn down per minute, with part of a minute counting as a full one. No subscription, no connection fee and no minimum. Rates start at $0.02 a minute and every rate for all 220+ countries is published in full before you sign up. If you are holding a specific number, the number checker prices it exactly.
Try it
Type a number. The price resolves from the digits before you dial.
Type a number to see its exact price.
Sign up and call. First minute on us, no card details.
Questions
- How can a browser call a real phone number?
- Browsers include WebRTC, which handles live audio without any plugin or download. The browser captures your voice and sends it to us over the internet, and we hand the call to a telecoms carrier that puts it onto the ordinary phone network. The internet carries the first half of the journey and the phone network carries the second, which is why the person at the other end needs nothing at all.
- Does the person I call need the same app?
- No, and this is the difference between a calling service and a messaging app. WhatsApp, FaceTime and Telegram only reach other people using the same app, on a smartphone, with data. A call placed here arrives on the ordinary phone network, so it reaches a landline, an old handset, an office switchboard or a phone menu just as well as a modern mobile.
- Do I need to install anything or buy a SIM?
- No. There is no app, no download, no SIM card and no phone number required to place a call. You need a browser, an internet connection and a microphone. That is deliberate: the situation people are usually in when they need this is one where installing software or buying a local SIM is exactly what they cannot do.
- Why is the price different for a mobile and a landline?
- Because the network that delivers the call charges us differently for each, and those are usually separate number ranges. We read which range a number falls in from its digits rather than asking you to guess. The gap can be large: across the countries where we publish both, one band costs at least twice the other in 45 of them, and in 24 the landline is the dearer one.
- What happens if the call does not connect?
- You are not charged. A call that rings out, hits an engaged tone or fails to connect costs nothing, because you pay for connected time only. Billing runs per minute from the moment the call is answered, with part of a minute counting as a full one.
- Is the call quality any good?
- It depends on your internet connection for the first half of the journey and on the ordinary phone network for the second. A stable connection gives you a call indistinguishable from any other. A weak or congested one will sound like a weak connection, which is the honest trade for not needing a SIM card or a mobile signal.