Is a missed call from an unknown number that I called back a premium-rate scam?
Yes — 'wangiri' or one-ring scams use numbers in premium-rate ranges. Calling back can result in a large charge appearing on your phone bill.
Last reviewed: 1 August 2026
Explanation
Wangiri (Japanese for 'one ring and cut') scams generate a single ring to your phone from a premium-rate number. The caller hangs up before you can answer, hoping curiosity will make you call back. The return call connects to a premium-rate line that charges a high per-minute fee, often with hold music or a lengthy recorded message designed to keep you on the line as long as possible.
The operation is fully automated: dialler software rings thousands of numbers in a burst, and the fraudsters share in the premium-rate revenue from everyone who returns the call. That is why the missed call is engineered to look tantalisingly incomplete — a single ring at an odd hour, sometimes repeated over several days, occasionally paired with a voicemail fragment that sounds cut off. Numbers in the +881, +882, +379, +269, and other less common country codes are frequent culprits, as are numbers that look local but route to premium services.
The defence costs nothing: an unfamiliar missed number with no message can simply be ignored, because anyone who genuinely needs you leaves a voicemail or sends a text. If curiosity persists, search the number online first — wangiri numbers accumulate complaint reports quickly. If you already called back and charges appeared, contact your carrier to dispute them and ask about barring international premium-rate calls, and report the number to your telecoms regulator so it can be blocked at network level.
Common red flags
- Single ring then cut — you cannot answer in time
- Number has an unusual country code or prefix you do not recognise
- You have no reason to be contacted from that country or code
- Online searches for the number show reports of premium-rate fraud
What to do now
- Do not call back unfamiliar missed-call numbers immediately
- Search the number online to check for premium-rate or scam reports
- If you already called back and saw a charge, contact your carrier to dispute it
- Report the number to your national telecoms regulator
Frequently asked questions
Can my carrier block premium-rate calls?
Most carriers allow you to bar calls to and from international premium-rate numbers. Contact your carrier to enable this option if you are concerned.
The same number has rung once and hung up several days in a row. Why?
Persistence raises the odds you eventually call back — repeated single rings are the automated dialler retrying its list. Block the number and ignore it; engagement of any kind is what the operation is fishing for.
Will my carrier refund charges from a wangiri call-back?
Policies vary: some carriers waive first-time premium charges on request, others only dispute them with the premium-line operator. Ask promptly either way, and request international premium-rate barring so it cannot recur.