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Call from a foreign number: should you call back?

How to react to a call from an unknown foreign number: high-risk prefixes, one-ring scam, and how to assess the context.

Receiving a call from a number starting with +44, +32, or another international prefix is not automatically suspicious. International banks, travel bookings, outsourced customer service centres, and friends living abroad all generate legitimate foreign calls. Context is everything.

The one-ring scam

A common trick is to let a call ring just once then hang up, hoping you call back a premium-rate number. Frequently abused prefixes include +222 (Mauritania), +678 (Vanuatu), and +252 (Somalia). In 2026, scammers increasingly spoof European-looking numbers such as +376 (Andorra), +44 (UK), or +32 (Belgium) via VoIP — the displayed number is an unreliable indicator of true origin.

Three questions to ask before calling back

  • Were you expecting an international call? A recent booking or contact abroad makes it plausible.
  • Do you have any connection to that country? If not, be cautious.
  • Was a voicemail left? Legitimate organisations typically leave a message.

Reporting

Search foreign numbers on TelCheck and report via Signal Conso (signalconso.gouv.fr). The general rule: if you were not expecting an international call, verify before engaging.