About area code 301: location, common spam callers, related area codes, and more. Includes 301 reverse phone lookup to identify spam callers.
Find 301 area code details including city, time zone, and map. Lookup area code 301 phone number, name, and location.
301 is an area code located in the state of Maryland, US. The largest city it serves is Baltimore. Location, time zone and map of the 301 area code
Lookup area code 301 details: major cities and timezone. View the 301 area code map in Maryland. Find the name of any phone number in area code 301.
Area Code 301 - Map, time zone, and phone lookup - CallerCenter
301 Area Code located in Maryland, including 114 cities, 12 counties, 1 time zone, map, Census demographics, and 773 active prefixes.
Browse area code 301 phone numbers, prefixes and exchanges. The 301 area code serves Washington, Beltsville, Silver Spring, Hyattsville, Frederick, covering 95 ZIP codes in 16 counties.
Area code 301 was the first area code for all of Maryland, from 1947, when the area code system was created, until 1991, when everything from Baltimore eastward was split off as area code 410. In 1997, area code 240 was added as an overlay area code for the 301 territory.
Profile and Interactive Map for Area Code 301 in Maryland - April, 2026
301 Area Code is part of 10 counties in the state of Maryland. There are around 18 cities and 292 other places such as towns, cdps and villages in the 301 area code. Area code 301 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Maryland.