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Area code 404 is a telephone area code in the North American Numbering Plan (NANP) for Atlanta, Georgia and its closest suburbs. This comprises roughly the area encircled by Interstate 285 . It is an enclave area code, surrounded by area code 770 , which serves most of Atlanta's suburbs.
Telephone numbers in area code 678 were first assigned to customers signing up for new telephone service on January 15, 1998. On September 2, 2001, area code 470, was added to the 678 overlay area of area codes 404 and 770. [1] Telephone numbers from the NPA were assigned after exhaustion of area code 678.
In 1947, Georgia was a single numbering plan area (NPA) with area code 404. In 1954, 912 was assigned to its southern and central areas. The state operated with two area codes until May 3, 1992, when area code 706 was created for the two separate areas outside of the metro Atlanta area.
568 reserved as a fifth area code for the region. 404: Georgia (Atlanta and the Atlanta metropolitan area inside of the Interstate 285 perimeter highway) 1947: created for all of Georgia; 1954: split to create area code 912; 1992: split to create area code 706; 1995: split to create area code 770; 1998: overlaid by 678; 405
The numbering plan area (NPA) is divided into three disconnected geographical regions. A small section is in west-central Georgia, in the region around Columbus. This is bordered by area code 334 to the west in Alabama, area code 478 to the east, area code 229 to the south, and metro Atlanta's 404, 678, 770, and 470.
In 1988, area code 407 was introduced for the Orlando area. [1] In 1995, area code 954 was introduced for Broward County. In 1996, area code 239 was introduced for southwest Florida and area code 352 for the areas around Gainesville and Ocala. Many new area codes were introduced in the first two decades of the 21st century, as a result of city ...
Area code 408 was split from area code 415 in 1959. The numbering plan area was reduced in geographic extent in 1998 for the creation of area code 831 . In 2012, area code 669 was assigned as a second area code for same numbering plan area by overlay .
In March 2011, central office code relief was implemented by adding area code 531 in an overlay to the same service area of 402. Although the first central office prefix in 531 was not assigned until February 2013, ten-digit dialing has been mandatory for all calls from the 402 territory since Spring 2011.