Area Code 240: Detailed Coverage, Cities, and Carrier Information for Maryland

Aspen Hill, Maryland, is covered by area code 240.

Area code 240 was implemented in Maryland on June 1, 1997.

Area code 240 was introduced as an overlay for area code 301 to accommodate the increasing demand for phone numbers in the region.

Yes, 10-digit dialing (including the area code) is mandatory for all calls within area code 240.

The North American Numbering Plan Administration (NANPA) regulates area code 240.

Area code 240 overlays the existing area code 301 in Maryland.

Major cities in area code 240 include Rockville, Gaithersburg, Germantown, Silver Spring, Frederick, Hagerstown, and parts of the Washington, D.C. suburbs.

Cumberland, Maryland is covered by area code 240.

Yes, area code 240 covers a significant portion of the Washington, D.C. metro area in Maryland.

Area code 240 supports landline, wireless, and VoIP phone services.

The original area code for western Maryland was 301, established in 1947.

Area code 301 was split to create area code 410 in 1991, with 410 serving Baltimore and the Eastern Shore.

Area code 227 was introduced as an overlay for area codes 301 and 240 in 2023.

Area code 240 covers many cities in western Maryland, including major ones like Rockville, Gaithersburg, Germantown, Silver Spring, and Frederick. It also serves parts of the Greater Washington, D.C. metro area, such as Aspen Hill, North Bethesda, and Bowie.

Area code 240 was implemented on June 1, 1997. It was introduced as an overlay for the existing 301 area code to accommodate the increasing demand for phone numbers in the region.

The growing need for phone numbers in western Maryland and the Greater Washington, D.C. area led to the creation of area code 240. It overlays the original 301 area code, allowing for more phone numbers within the same geographic region.

Ten-digit dialing is mandatory for calls within area code 240. You must dial both the area code (240) and the seven-digit phone number. This applies to landlines, wireless phones, and VoIP services.

Area code 240 is an overlay for the original 301 area code in Maryland. Overlays are implemented to provide additional phone numbers within an existing geographic area without requiring current users to change their numbers.

The North American Numbering Plan Administration (NANPA) regulates area code 240. NANPA oversees the allocation and assignment of phone numbers across North America, ensuring efficient and consistent numbering practices.

Hagerstown, Maryland is in area code 240. This area code covers a large portion of western Maryland and was introduced in 1997 as an overlay to area code 301.

Yes, VoIP (Voice over Internet Protocol) services are available within area code 240. Along with traditional landline and wireless services, VoIP is supported by various telecom carriers operating in the region.

Area code 301 was one of the original North American area codes, established in 1947. It initially covered a larger area of Maryland. In 1991, part of its territory became area code 410, and in 1997, 240 was added as an overlay.

Ten-digit dialing (including the area code) is always required when calling a number within area code 240. This rule helps avoid confusion and ensures calls are correctly routed since 240 is an overlay for the 301 area code.

Several major telecom carriers offer landline, wireless, and VoIP services within area code 240. While the article doesn't list specific providers, you can find them by searching online for 'phone service providers in [city name]' where the city is within the 240 area code.