Wangiri: the "one ring" phone scam (UK 2026)

A Japanese term for a worldwide technique

Wangiri (ワン切り) literally means "one (ring) and cut." An autodialer places a very high volume of calls, often through spoofed or international numbers, and hangs up automatically after a single ring. The goal isn't conversation — it's to generate a visible missed call, intriguing enough to make the victim call back voluntarily.

The callback trap

The number displayed is actually a premium-rate or revenue-share number. By calling back, the victim is connected to a line billed per minute at a very high rate — sometimes kept artificially on hold with a recorded message or music while the charges add up. This is a variant of International Revenue Share Fraud (IRSF), a scheme that profits both the operator behind the premium number and the organiser of the calling campaign.

UK: Ofcom tightens the rules on spoofed numbers

42%

Of UK phone users said they'd received a suspicious call in the previous three months, according to Ofcom research published in February 2025 — a figure that includes one-ring and spoofed-caller-ID campaigns.

Ofcom, consumer research, Feb. 2025.

Early 2026

When Ofcom plans to publish its decision on new rules requiring operators to withhold caller ID on international calls that spoof a UK mobile number, following a consultation opened in July 2025.

Ofcom, "Tackling scam calls from abroad" consultation, July 2025.

Criminal networks abroad often spoof a UK mobile number because people are more likely to answer a call that looks domestic than an unfamiliar overseas one — the exact same trust that wangiri campaigns exploit with a bare missed call.

The premium-rate ranges this scam runs on

Wangiri needs a paying destination, and in the UK those destinations are not anonymous: Ofcom has designated specific numbering ranges as premium-rate or revenue-share, where the person returning the call is the one billed. That is the entire mechanism — one ring, you ring back, you are charged.

United Kingdom — Ofcom: the 070, 084, 087 and 09 ranges.

Egidio carries these ranges and recognises them from the moment the app is installed — nobody has to have reported the number first. A campaign that burns through fresh numbers every day is still dialling from within the same range, so nothing slips through on novelty alone.

Wangiri

An automated single-ring call designed to trigger a voluntary callback from the victim to a premium-rate number.

Premium-rate number

A number billed at a high per-minute rate, often international, used as the callback destination.

IRSF

International Revenue Share Fraud: artificially generated traffic produces commissions paid back to the operator of the premium number.

🔒 Egidio analyses the frequency, duration, and origin of incoming calls to spot a wangiri pattern — a single ring from an unknown number — and automatically flags it as unwanted in your call history, before you're ever tempted to call back.

What to do about a suspicious missed call

Never call back an unknown number that rang only once.
Check the dialling code before doing anything if the number looks foreign.
Report it to your network provider or via Ofcom's scam call guidance.

Frequently asked questions

What does "wangiri" mean?

It's a Japanese term meaning literally "one (ring) and cut" (ワン切り). It describes the technique of calling and hanging up after a single ring, to lure the victim into calling back. In the UK it's often called a "ping call" or "one ring" scam.

Why can calling back an unknown number be expensive?

The number displayed is often an international premium-rate number. By calling back, the victim is connected to a service billed per minute at a very high rate, sometimes kept on the line artificially with a hold message.

What should I do if I get a very short missed call from an unknown number?

Do not call back. Check the dialling code before taking any action if the number looks international, and report suspicious calls to your provider or Ofcom.