What is an Area Code?
An area code is a three-digit number used in the North American Numbering Plan (NANP) to designate specific geographic regions for telephone services. Introduced in 1947, area codes make long-distance dialing easier and organize the country into calling zones.
Why Area Codes Matter
- Call Routing: Directs calls to the correct region or city.
- Regional Identity: Many cities are recognized by their area codes, such as 212 for New York or 310 for Los Angeles.
- Business Use: Companies use local area codes to connect with customers in specific markets.
- Population Growth: New area codes are added as regions expand and require more phone numbers.
Explore U.S. Area Codes
Every state has one or more area codes covering its cities, towns, and counties. From the oldest codes like 213 in California to the newest additions, areacode.us provides accurate details about each one.
Tools & Resources
Area Code Lookup
Enter an area code to find its location, state, and major cities served.
State Area Codes
Browse area codes by U.S. state and see which regions they cover.
Area Code Maps
Visual maps to understand geographic coverage and overlapping codes.