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678 is a North American Numbering Plan area code assigned to metropolitan Atlanta, Georgia. The area code was first assigned to customers signing up for new telephone service on January 15, 1998. In local shorthand, 678 is usually written in shorthand for informal communication, such as 6-555-1234 being short for 678-555-1234. A new area code, 470, was established as an overlay of 678 and activated on February 26, 2010.
The 678 and 470 area codes are an overlay of the 404 and 770 area codes (those two covering separate areas for landlines, 404 covering primarily Atlanta proper and 770 the remainder of the metropolitan area). They were introduced to relieve telephone exchanges in the world's largest toll-free calling zone.
Although ten-digit local dialing had been possible in the Atlanta area since area code 770 was introduced in 1995, it was not until January 1, 1998, when 678 was implemented, that ten-digit dialing finally became required across the entire metro area.
Local residents often use shorthand to refer to metro Atlanta area codes: 404 becomes 4, 678 becomes 6, and 770 becomes 7. The addition of area code 470 breaks the established scheme, since it cannot be shortened by using just its first digit or even its second digit.
|Georgia area codes: 229, 404, 470, 478, 678, 706, 762, 770, 912|
|West: 256/938||678/470 (overlaying 404 and 770)||East: 706/762|
|South: 478, 706/762|
|Alabama area codes: 205, 251, 256, 334, 938|
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