How to use the area code lookup
Type any 3-digit US area code into the input field and click Look Up (or press Enter). The tool shows the state, city or region, and time zone for that area code.
About US area codes
US area codes are administered by the North American Numbering Plan (NANP). The first digit is never 0 or 1. Overlay codes share a geographic region with an existing code when phone number exhaustion occurs.
Frequently Asked Questions
Why do some cities have multiple area codes?
When a region runs out of available phone numbers, a new overlay area code is introduced covering the same geography. Callers must use 10-digit dialing in overlay regions.
Does the area code always indicate location?
With mobile number portability, a phone can keep its original area code even after moving to a different state, so the area code only reliably indicates the original registration area.