One-ring (Wangiri) call-back scams
Wangiri, or one-ring, scams place a brief automated call that immediately hangs up, hoping the recipient calls back a premium-rate number and unknowingly incurs large per-minute charges, a fraud pattern originating in Japan that has since spread internationally through spoofed international numbers.
What we know
Wangiri, a term borrowed from Japanese meaning roughly "one ring and cut," describes a scam in which an automated system places a very brief call to a large volume of phone numbers, ringing once or twice before disconnecting, relying on natural human curiosity or concern about a missed call to prompt the recipient to call the number back. The number the scam calls from, or leaves as a missed call, is typically a premium-rate number, often registered in a small or unfamiliar country code, that charges the caller a high per-minute rate once connected, with a portion of that revenue routed back to the scammer through premium rate telephony billing arrangements.
The scam originated in Japan in the early 2000s, where it takes its name, and has since spread internationally, with telecommunications regulators in the United States, United Kingdom, and elsewhere issuing periodic public warnings about surges in this fraud pattern. The U.S. Federal Communications Commission and Federal Trade Commission have both published consumer guidance specifically addressing one-ring scams, often associated with missed calls appearing to originate from unfamiliar international area codes, including codes resembling but distinct from recognizable domestic ones, such as Caribbean country codes that can superficially resemble North American area codes to an inattentive recipient.
Modern wangiri variants increasingly use caller ID spoofing technology to disguise the true origin of the call, sometimes making the missed call appear to come from a local or even familiar-looking number, increasing the likelihood a recipient will call back without recognizing the international premium-rate destination behind the disguised number. Some variants also leave a voicemail using automated or vague language designed to encourage a callback, such as claiming to be a delivery service, a family member's hospital, or an urgent business matter, adding social engineering on top of the basic missed-call mechanism.
Because the fraud depends entirely on the victim initiating the costly callback voluntarily, telecommunications carriers have limited ability to block the scam entirely at the network level, though some carriers do maintain lists of known premium-rate numbers associated with reported fraud and can flag or block calls to those specific numbers once identified. International telecommunications bodies, including working groups associated with the GSMA, the global trade body representing mobile network operators, have periodically coordinated information sharing about active wangiri campaigns across member carriers.
Consumer protection guidance from the FCC, FTC, and equivalent regulators in other countries recommends not returning calls to unfamiliar international numbers, particularly a missed call with only one or two rings that did not allow time for a voicemail or normal conversation to occur, checking an unfamiliar area or country code through an online lookup before calling back if there is genuine uncertainty about a missed call's legitimacy, and reviewing phone bills regularly for unexpected premium-rate charges, reporting any unauthorized charges to one's carrier promptly since some jurisdictions allow disputing fraudulent premium-rate charges through the carrier or telecommunications regulator.
Common claims
- I should call back a missed call even from an unknown international numberRisky - one-ring scam numbers are designed to be called back
- Calling back costs only my regular call rateFalse - calls to premium international numbers incur large per-minute charges
- My carrier will block Wangiri callsPartially true - carriers can block known patterns but cannot block all variations