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The blue area is assigned area codes 301, 240, and 227; the red area is area codes 410, 443 and 667. The state of Maryland is served by the following area codes:
The three area codes are overlay codes for one numbering plan area, among which 410 was the initial area code for the NPA, when it was split from area code 301 in 1991. 443 and 667 found assignment primarily in cellular service and for competitive local exchange carriers, such as Comcast and Cavalier Telephone, when introduced, but have since ...
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 split off as area code 410. 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 ...
A small section of ZIP Code 20707 is located in Montgomery County. [67] [68] According to the United States Census Bureau, the city has a total area of 4.33 square miles (11.21 km 2), of which 4.30 square miles (11.14 km 2) is land and 0.03 square miles (0.08 km 2) is water. [69]
The area was developed by several subdivisions during the period between 1910 and 1930 as an upper middle class neighborhood, with many houses built on double lots. Sales in 1910 indicated houses were priced at $4,000 at a time when the typical house in Baltimore sold for $1,200.
In NANP telephone number specifications, the letter N represents a numeral from 2 through 9, while the letter X represents any numeral. Thus, NXX is a number from 200 through 999, while XXXX is a range from 0000 through 9999. The first three digits of a telephone number are the numbering plan area code (NPA code, or simply NPA).
Mobile phones use geographic area codes. Exchanges may service on mobile devices; local numbers are portable between wired and wireless carriers. While area code 600 has been established as a non-geographic code that can be used by mobile phones, the only significant mobile usage has been for satellite phone service in remote regions. Cape ...
[3] Name on the Register [4] Image Date listed [5] Location City or town Description 1: Airview Historic District: Airview Historic District: December 29, 2004 (701-720 E. Main St. extended