A missed call from a number starting with a + and a country code you don't recognise can be unsettling - especially when you don't know anyone abroad. Most of these calls aren't a person trying to reach you at all; they're automated systems behind international call-back scams. This guide explains how they work, which patterns to watch for, and why the right response is almost always to do nothing.
How international call-back scams work
The mechanics are simple and entirely automated. Scammers use computers to dial huge lists of UK numbers from overseas, letting each ring once or twice before hanging up. The hope is that curiosity or worry will make some people call back. When you do, you may be connected to an expensive international or premium-rate line, kept on hold or fed a recorded message, while the scammer earns a share of the call revenue.
This is the international cousin of the one-ring "Wangiri" scam (Wangiri is Japanese for "one ring and cut"). The same logic drives 09 premium-rate call-back scams within the UK - the profit is entirely in getting you to dial.
Spotting an international number
The giveaway is the format: a + followed by a country code, or 00 then a country code. A few examples of codes you might see:
| Starts with | Region |
|---|---|
| +1 | USA / Canada |
| +33 | France |
| +34 | Spain |
| +44 | United Kingdom |
| +91 | India |
| +234 | Nigeria |
Remember that +44 is the UK's own code, so a +44 7 number is just a UK mobile in international format, not a foreign call. For anything else, the free phone number checker can help you make sense of the number, and a quick search of the full number will often show it's already been reported.
The big red flag: a "UK" caller from abroad
One pattern deserves special attention. If you get a call claiming to be from a UK bank, HMRC, a delivery company or a government department, but the number is clearly international, that mismatch is a strong sign of fraud. Genuine UK organisations call from UK numbers. Scammers operating overseas sometimes forget to disguise this, or rely on you not noticing.
A realistic example:
A recorded voice says it's "from HMRC" and warns of legal action unless you press 1 - but the number on your screen starts with an unfamiliar foreign code. No UK tax authority operates that way. It's a scam; hang up.
What to do with an international call you don't recognise
- Don't call back. If you genuinely know someone abroad, you'll recognise their number or be expecting contact. An unexpected foreign missed call is best left alone.
- Don't press buttons on a recorded international call, and don't follow "press 1" instructions.
- Check and search the number with the free phone number checker and a web search.
- Block it - see how to block unwanted calls - and ask your provider whether they can bar premium and international call-backs if you're worried.
- Report it to Action Fraud and forward details to 7726.
When it might be genuine
Not every international call is a scam. Friends or family travelling abroad, an overseas supplier, or a UK mobile roaming overseas can all show up with a + prefix. The deciding factors are whether you were expecting contact and whether the caller leaves a sensible voicemail. If in doubt, let it go to voicemail and verify before calling back - international call-backs can be costly even when they're legitimate.
The bottom line
An unexpected international missed call is almost always an automated scam built around one goal: getting you to call back an expensive line. The safe response is to leave it, check and block the number, and report it. Be especially wary of any "UK" organisation calling from a foreign number - that mismatch alone is enough reason to hang up.
Frequently asked questions
Why did I get a missed call from an international number?
Most likely an automated call-back scam: scammers dial huge lists of UK numbers from abroad, ring once, and hang up, hoping you'll call back an expensive international or premium line. It's rarely a real person trying to reach you.
Should I call back an international number I don't recognise?
No. If you genuinely know someone abroad you'll recognise the number or expect the call. An unexpected foreign missed call is best ignored, because calling back is exactly what the scam is designed to make you do, and it can be costly.
Is +44 an international scam code?
No - +44 is the UK's own dialling code, so +44 7... is just a UK mobile written in international format. It's only genuinely "international" if the call routed from abroad; the number itself is British.
A foreign number claimed to be my UK bank - is that real?
Almost certainly not. Genuine UK banks and government bodies call from UK numbers. A "UK organisation" calling from an international number is a strong sign of fraud - hang up and, if needed, call the organisation back on a trusted UK number (159 for banks).
