Check a number's area code

What the number reader shows

Type ten digits into the box above, with or without brackets and dashes, and the reader splits them into the parts of a North American number: the area code (the first three digits), the exchange (the next three) and the line (the last four). It then looks the area code up in a list of codes and tells you the region, the main places the code serves and the time zone. If the digits fit a pattern that deserves attention, such as a toll-free code or a Caribbean code that dials like a local call, it adds a short note in plain words.

That is the whole job. It is a reading of the digits, in the way you could read a street sign, not a search through personal records.

What it does not know

It does not know who owns the number, what carrier runs it, whether it is a landline, a mobile or an internet line, or whether other people have complained about it. It also cannot say where the caller is standing. A mobile number keeps its original area code when its owner moves, and spoofed calls borrow codes at will. So please treat the result as background, never as proof that a call is safe or that it is a scam.

How to read each line of a result

Area code and region

This tells you where the number was first set up. For a home line that is usually still where the person lives, and for a mobile it often isn't. The list of main places helps you see whether the code is one you know. If you have family in that region, an unfamiliar call could be innocent.

Time zone

It sounds minor, but it is a useful clue. A call at 9 pm that comes from a time zone where it is already midnight is a hint that the caller does not care about your evening, which many telemarketers do not. A legitimate local business would not call you that late.

Notes

The notes appear only when something in the digits stands out. A toll-free code has no home city, since anyone can rent a line. A premium 900 number charges by the minute. A Caribbean code can be a different country that looks domestic, and calls back there may cost money. A repeated-digit pattern or a 555 exchange can be a sign of a test or a fake number.

What to do next with a number you do not know

1. Do not call back a number from a code you do not recognize, especially after a single ring.
2. If a company says it called you, find that company's number on its official website or on your own statement, and call that one.
3. Let unknown calls go to voicemail. A real caller with a real reason usually leaves a message.
4. If the number keeps coming back, block it with the tools your landline already has.
5. If it was a scam attempt, report it at reportfraud.ftc.gov. You can also forward spam texts to 7726.

To understand the odd names that sometimes appear on the screen next to a number, see why landline caller ID names look strange. And if the number is hidden entirely, anonymous call rejection is the usual remedy.

Common questions people bring to the box

People often ask whether the reader can tell them who called while they were out. It cannot, and I would rather say so plainly than imply otherwise. Others ask whether a particular code is "a scam code." No area code is a scam code; scammers use all of them, and they pick local-looking ones precisely because you will trust them. If you typed a number you saw on a bill or a website and want to confirm it is real, compare it to the number printed on an official page you reached yourself.

The reader keeps no list of the numbers it is asked about. Your input is handled during the request, and ordinary web server logs can hold it for about a week, as the privacy policy explains.