Location Info
Find the state and location linked with a US area code.
Major Cities
View the main cities and communities associated with each area code.
Time Zone
Check the local time zone used by the area code.
Related Codes
See overlay and related area codes for quick reference.
Popular US Area Codes
Quick access to some of the most commonly searched US area codes.
Find Area Code Location, Cities & Time Zone
Area Codes Atlas provides practical information about US telephone area codes, including location, major cities, local time zone, introduction date and related or overlay codes.
- Search any valid 3-digit US area code
- Review major cities and location details
- Check time zone and introduction information
- Move between related area-code pages
Browse the complete list when you do not know the exact code.
Open Area Code Directory →Frequently Asked Questions
Quick answers about US area codes and how to use this lookup.
What is a US area code?
A US area code is the three-digit code used before a local telephone number to identify a numbering-plan area.
How do I find where an area code is located?
Enter the three-digit code in the lookup above. A valid code opens its page with location, cities, time zone and related details.
What is an overlay area code?
An overlay is an additional area code assigned to the same geographic region as an existing code.
Can multiple area codes serve the same city?
Yes. Large metro areas can use overlays or neighboring numbering-plan areas, so a city may be associated with more than one area code.
Search a US Area Code
Use the directory to find detailed information for any available US area code.