Missed calls from unknown country codes: the wangiri scam explained

By Rohan Verma, Editor, Technical & Global

Your phone rings once from a number you don't recognise, in a country code you've never dialled. Curiosity kicks in and you call back. Fifteen minutes later your bill shows a ₹1,800 charge for a 45-second connection to a premium-rate number in Somalia. That's wangiri — Japanese for "one ring and cut". It's the most industrialised phone scam on the planet and it runs on autopilot.

How the scam works

Fraud rings lease blocks of premium-rate numbers in countries with weak revenue-share oversight — Somalia (+252), Tunisia (+216), Sierra Leone (+232), Latvia (+371), Cook Islands (+682) — and pay the local carrier a cut of every call minute billed. They then use robo-dialers to drop one-ring calls to millions of numbers. Every callback earns them roughly $2–$6 per minute, split with the carrier.

The victim isn't scammed out of information. They're scammed out of the international long-distance rate on their next phone bill.

The country codes that should never get a callback

• +252 — Somalia
• +216 — Tunisia
• +232 — Sierra Leone
• +371 — Latvia
• +375 — Belarus
• +995 — Georgia
• +682 — Cook Islands
• +880 — Bangladesh (also heavily used for WhatsApp text scams)

Unless you have a family member or a business contact in that specific country, assume the number is wangiri and don't return the call. See the full country-code guidefor the reasoning per code.

Why the caller ID looks "almost normal"

Modern wangiri dialers use number-neighbouring — they spoof a caller ID that looks like a plausible international number, sometimes even mimicking a country code you've dialled before. The one-ring pattern is the giveaway; the caller ID isn't.

If you already called back

1. Hang up the moment you hear a recording, a hold-music loop, or a "please stay on the line" message. Every second is billed.
2. Check your carrier's app for the call charge. If it's above the standard IDD rate for that country, contest it with customer care — carriers sometimes reverse the first wangiri callback as a goodwill gesture.
3. Block the number.
4. Report it on PhoneLookup — wangiri numbers get reused across thousands of subscribers, and every report shortens the number's useful lifespan.

The permanent fix: barring international outgoing

If you never make international calls, ask your carrier to bar international outgoing entirely (ISD outgoing barring). It's free with every operator and removes the wangiri attack surface completely. Turning it back on later is a two-minute request.

Wangiri is a rare scam where doing nothing is the correct response. Let the phone ring, don't call back, and if you do — hang up fast.