Learn about the 240 area code, including its location, cities, time zone, introduction date, and related area codes.
240 Area Code Details
Major Cities in the 240 Area Code
The 240 area code is associated with the following cities and communities:
- Aspen Hill
- Bowie
- Chillum
- Clinton
- College Park
- Cumberland
- Fairland
- Fort Washington
- Frederick
- Gaithersburg
- Germantown
- Greenbelt
- Hagerstown
- Landover
- Montgomery Village
- North Bethesda
- North Potomac
- Olney
- Potomac
- Rockville
- Saint Charles
- Silver Spring
- South Laurel
- Suitland
- Waldorf
- White Oak
Where Is Area Code 240 Located?
The 240 area code serves communities in Maryland. The exact communities and numbering assignments can change as telephone numbering resources are updated.
240 Area Code Time Zone
The 240 area code is associated with the Eastern time zone.
When Was 240 Area Code Introduced?
The 240 area code was introduced in 01-Jun-1997.
How to Call a 240 Area Code Number
For a call within the same numbering plan, dial the required local number according to your carrier’s dialing rules. For calls from outside the United States, use the United States country code (+1), followed by the area code and seven-digit telephone number.
Related Area Codes
240 Area Code FAQ
What state is 240 area code in?
The 240 area code is associated with Maryland.
What time zone is 240 area code in?
The 240 area code is associated with Eastern.
What cities use 240 area code?
Aspen Hill|Bowie|Chillum|Clinton|College Park|Cumberland|Fairland|Fort Washington|Frederick|Gaithersburg|Germantown|Greenbelt|Hagerstown|Landover|Montgomery Village|North Bethesda|North Potomac|Olney|Potomac|Rockville|Saint Charles|Silver Spring|South Laurel|Suitland|Waldorf|White Oak
More Questions About Area Code 240
What state is area code 240 in?
Area code 240 is associated with Maryland.
What time zone is area code 240 in?
The listed time zone for area code 240 is Eastern.