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Where is area code 240? Area code 240 is located in western Maryland and covers Germantown, Silver Spring, Waldorf, Frederick, and Rockville. It is an overlay for area code 301 and serves the same area.

Mar 1, 2026 · Area Code 240 is located in Maryland. It covers 111 cities, including Baltimore, Columbia, Cumberland, Waldorf, and Silver Spring. It also covers 13 counties, including Montgomery County, …

Lookup information on Area Code 240 - get demographic, NPA NXX, and other data by area code

Area Code 240 Boundary Map List of ZIP Codes in Area Code 240 ... List of Counties in Area Code 240 ... List of Major Cities/Towns in Area Code 240

2 days ago · 240 is an area code located in the state of Maryland, US. The largest city it serves is Germantown. Find out where 240 area code zone from, which states, counties and cities it covers. …

Browse area code 240 phone numbers, prefixes and exchanges. The 240 area code serves Washington, Beltsville, Frederick, Hagerstown, Annapolis Junction, covering 46 ZIP codes in 16 …

Find 240 area code details including city, time zone, and map. Lookup area code 240 phone number, name, and location.

About area code 240: location, common spam callers, related area codes, and more. Includes 240 reverse phone lookup to identify spam callers.

In 1997, area code 240 was added as an overlay area code for the 301 territory. On June 14, 2023, a third overlay code, 227, was added to provide more central office prefixes for new telephone numbers.