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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.
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Area code 670; Area code 671; Area codes 678, 470, and 943; Area code 679; Area code 680; Area code 682; Area code 684; Area code 700; Area code 701; Area codes 702 and 725; Area code 703; Area codes 704 and 980; Area codes 706 and 762; Area codes 707 and 369; Area codes 708 and 464; Area code 710; Area code 712; Area code 713; Area codes 715 ...
Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.
In September 2005, 762 was overlaid to all of the existing area code 706, despite the fact that it has been physically split into two separate and disconnected sections since it was created in 1992. [2] Georgia is served by ten area codes. The newest area code, 943, went into service in March 2022 as another area code for the Atlanta area. [3]
When it changed to 10 digit dialing people started having to remember area codes all the time. When 770 came out people started writing 7/ as short hand for the area code, so when 678 was introduced it was treated the same way with a 6/. Atlanta had 10 digit dialing before the rest of the country so it's probably not common in most other areas.
Initially, area codes with the middle digit 0 were assigned to numbering plan areas that comprised an entire state or province, while jurisdictions with multiple numbering plan areas received area codes having 1 as the second digit. As network growth could not be predicted accurately over more than a few years, this pattern was abandoned by ...
Numbering plan areas and area codes since May 2001 September 1997 [1] – May 2001 [2] July 1988 [3] – September 1997 [4] [5] October 1947 – July 1988 [6]. Massachusetts is divided into five distinct numbering plan areas (NPAs), which are served by nine area codes in the North American Numbering Plan (NANP), [7] organized as four overlay complexes and a single-area code NPA.