Find any 301- phone number in Maryland
The 301 area code is an area code in Maryland and is one of the 86 original area codes created in 1947 when the North American Numbering Plan (NANP) was established. It serves the entire state of Maryland, as well as parts of neighboring West Virginia and Virginia. It is one of Maryland's two original area codes; the other is 410. When 301 was split in 1995, some of its territory became 240.
The NANP is a system of area codes and phone numbers that allows all North American countries, specifically the United States, Canada, and parts of the Caribbean, to communicate using the same number format. Each area code is a three-digit code that uniquely identifies a geographic region. In addition to area codes, the NANP also uses a seven-digit local phone numbers for each area code. This allows for 10 million possible phone numbers in each area code. The NANP is an important part of North American communication networks, and the 301 area code is the designated code for Maryland.