The one-ring scam and the '+1' codes that aren't as local as they look
There is no US area code you should never answer — most robocalls just fake a local one. The real trap is the one-ring (wangiri) scam: a missed call from a number that looks domestic because it shares the +1 country code, but is actually an international line that charges premium rates when you call back.
Bottom line: there is no domestic area code you should never answer. About 74% of robocalls fake a local code, so a familiar area code proves nothing. The real trap is calling back an unknown number whose +1 code is actually international.
What the one-ring (wangiri) scam is
An automated system rings your phone once from an international number, then hangs up before you can answer. The point is the missed call — a number you don't recognize, tempting you to call back. If you do, you're connected to a premium international line and billed steep per-minute charges, some of which flow to the scammer. "Wangiri" is Japanese for "one ring and cut." The FCC and FTC both publish advisories on it.
The +1 codes that aren't as domestic as they look
The United States, Canada, and about 20 Caribbean and Atlantic nations all share the +1 country code under the North American Numbering Plan. So a call from Grenada or Jamaica shows up as an ordinary 3-digit area code on your caller ID — indistinguishable from a US number at a glance — but calling it back is an international call. These are the foreign +1 area codes:
| Area code | Country / territory |
|---|---|
| 242 | Bahamas |
| 246 | Barbados |
| 264 | Anguilla |
| 268 | Antigua and Barbuda |
| 284 | British Virgin Islands |
| 345 | Cayman Islands |
| 441 | Bermuda |
| 473 | Grenada |
| 649 | Turks and Caicos Islands |
| 658 | Jamaica |
| 664 | Montserrat |
| 721 | Sint Maarten |
| 758 | Saint Lucia |
| 767 | Dominica |
| 784 | Saint Vincent and the Grenadines |
| 809 | Dominican Republic |
| 829 | Dominican Republic |
| 849 | Dominican Republic |
| 868 | Trinidad and Tobago |
| 869 | Saint Kitts and Nevis |
| 876 | Jamaica |
The most impersonated are 809 (Dominican Republic — the original "809 scam") and 876 (Jamaica — heavily used in lottery-prize call-back scams). Overlay codes such as 829 and 849 (Dominican Republic) and 658 (Jamaica) cover the same countries.
US territories are domestic. Puerto Rico (787/939), the US Virgin Islands (340), Guam (671), the Northern Mariana Islands (670), and American Samoa (684) also share +1 — but they're US territories, so calls to and from them are billed like any other US call. They are not on this list.
What to do
- Don't call back a one-ring or missed call from a number you don't recognize.
- If it's important, the caller will leave a voicemail or text.
- Before returning any unfamiliar call, check the area code — if it's on the list above, a call-back is an international premium call.
- Report one-ring scams at reportfraud.ftc.gov, and ask your carrier about blocking international calls you don't make.
Curious about a specific number? Look it up. See also 555 phone numbers and the folklore of “cursed” numbers.
Frequently asked questions
Which area codes should you never answer?
There is no US area code you should never answer. About 74% of robocalls fake a local area code, so blocking whole codes mostly blocks real calls while spoofed ones still get through. The real risk isn't answering — it's calling back an unknown international number in the one-ring (wangiri) scam, where numbers that share the +1 country code look domestic but bill premium international charges.
What is the one-ring or wangiri scam?
A scammer's system places a single ring from an international number that shares the +1 country code — often a Caribbean country like Jamaica (876) or the Dominican Republic (809) — then hangs up before you answer. The missed call tempts you to call back out of curiosity. If you do, you're connected to a premium international line and racked up per-minute charges that can flow to the scammer. 'Wangiri' is Japanese for 'one ring and cut'.
Is the 876 area code a scam?
876 is Jamaica's area code, not a scam in itself — legitimate calls come from it every day. But because 876 shares the +1 country code with the US, it looks like a domestic number on caller ID, and scammers use it for one-ring call-back traps and lottery scams. Don't call back an 876 number you don't recognize; a real caller will leave a voicemail.
Is 473 a US area code?
No. 473 is the area code for Grenada, in the Caribbean. It shares the +1 country code with the United States and Canada, so on caller ID it looks like an ordinary US area code — but dialing it is an international call that can carry premium per-minute charges. The same is true of codes like 809, 268, and 649.
What should I do if I get a one-ring call from an unknown number?
Don't call back. If it matters, a real caller will leave a voicemail or text. If you're curious, check the area code first — if it's one of the +1 international codes (like 876, 809, or 473), treat a call-back as an international premium call. You can report one-ring scams to the FCC and the FTC.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of July 4, 2026. Refreshed monthly.