One-Ring Wangiri Callback Scams via Phone Calls
How scammers make single-ring calls from international premium-rate numbers, hoping the recipient will call back and incur high per-minute charges.
Part of: One-Ring (Wangiri) Callback Scams
Last reviewed: 8 June 2026
The wangiri scam — named from the Japanese for 'one ring and cut' — is a simple but effective fraud that exploits human curiosity and telephone billing mechanisms. An automated system dials thousands of numbers, allowing each to ring once before disconnecting. The missed call shows an unfamiliar international number.
Recipients who call back connect to an international premium-rate line, charged at several pounds or dollars per minute. The call may connect to a hold tone, an automated message designed to keep the caller on the line, or a recorded advertisement, all while charges accumulate. Victims typically discover the cost only when their phone bill arrives.
How this scam works on phone calls
A missed call notification appears from an international number, often with a country code that looks similar to a US area code (+1 followed by Caribbean or Pacific island codes) or from less familiar countries. Curiosity or the assumption that a known contact is calling from abroad motivates the callback.
Modern wangiri campaigns sometimes personalise the approach: a brief voicemail is left claiming to be from a courier service, a bank, or a prize notification, creating a more compelling reason to call back. Some campaigns send SMS follow-ups saying the missed call was important.
Common red flags
- Single missed ring from an unfamiliar international number
- Country code appears similar to a US area code but originates from an international premium-rate number
- Voicemail or SMS follows up urging you to call back the missed number
- The number is not in your contacts and no context explains who might be calling from that country
How to protect yourself
- Do not call back missed calls from unfamiliar international numbers
- Search the number online before calling back — wangiri numbers are often reported on scam-reporting sites
- Ask your carrier to block international premium-rate calls from your account
- Enable caller ID or spam-call screening features on your device
- If you called back, contact your carrier to dispute and remove the premium-rate charges
How to report it
- Report the number to your national telecom regulator (Ofcom UK, FCC US)
- Report to the FTC at reportfraud.ftc.gov (US)
- Report to your carrier so they can block the number for other customers
Frequently asked questions
How can a missed call cost me money?
The cost comes from calling back, not from receiving the call. The number you call is an international premium-rate line that charges high per-minute rates. Your carrier bills these through your normal phone account.