Area codes 678 and 470

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Area codes 678 and 470 are North American Numbering Plan area codes assigned to metropolitan Atlanta, Georgia. They serve as overlays for the 404 and 770 area codes, which serve Atlanta itself and the suburbs (and exurbs) respectively.

678 was first assigned to customers signing up for new telephone service on January 15, 1998; 470 was activated on February 26, 2010.[1] They were introduced to relieve telephone exchanges in what was, then as now, one of the largest toll-free calling zones in the world. No long-distance charges are applied for calls from one portion of the area to another, regardless of the area codes.

Although ten-digit dialing had been used 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.[2]

All prefixes within 404 are assigned, the last having been in October 2013.[3] 678 is also out of prefixes, leaving only 770 and 470 available — although previously-used numbers from all area codes are always available for reassignment to new customers. Despite existing for decades before this change, the largest customer using 470 is Kennesaw State University in Kennesaw, which was forced to change hundreds of phone numbers when the Georgia Board of Regents forced schools in the University System of Georgia to have their own cheaper internal phone systems, and the FCC failed to make local number portability applicable to businesses and government, allowing AT&T to refuse KSU to take its own numbers to the new provider. A few other landline prefixes have 470, mostly in exurban areas where major new land development has more than offset the general decline in landline usage. Google Voice only has 470 numbers available.

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Georgia area codes: 229, 404, 470, 478, 678, 706, 762, 770, 912
North: 706/762
West: 256/938 678/470 (overlaying 404 and 770) East: 706/762
South: 478, 706/762
Alabama area codes: 205, 251, 256, 334, 938

Coordinates: 33°45′16″N 84°23′23″W / 33.75449°N 84.38966°W / 33.75449; -84.38966