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Area code 770 was therefore assigned to Atlanta's suburbs just three years later in August 1995, requiring ten-digit dialing between them, and with all mobile phones keeping 404. 678 was given to both the city and its suburbs in January 1998, becoming the first overlay area code in the state, and forcing mandatory ten-digit dialing for all calls.
Area code 404; Area code 478; Area codes 678, 470, and 943; Area codes 706 and 762; Area code 770; Area code 912 ... Mobile view ...
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.
The entire metro Atlanta region with area codes 404, 770, 678, 470, and 943 is a local calling area, one of the largest in the United States, without long-distance charges for calls between area codes. All calls in the area are dialed with ten digits.
The current dialling plan is in force since 4 June 2011 when a wide-ranging reform took place. Specifically, area codes were updated to start with 2 or 3, mobile numbers came to begin with the digit 5, and some geographical numbers were padded with an additional digit 2 or 3 immediately after the area code to the total number of digits equalling 9.
By the end of the 1990s, 912 was on the brink of exhaustion due to the proliferation of cell phones and pagers, especially in Savannah, Macon, and Albany. On August 1, 2000, area code 912 was reduced in size in a three-way split to permit more central office codes in the southern half of the state. Savannah and the eastern portion retained 912.
The area is the world's largest toll-free calling zone spanning 7,162 square miles (18,549 km 2), [27] has four active telephone area codes, and local calling extending into portions of two others. 404, which originally covered all of northern Georgia until 1992, now covers mostly the area inside the Perimeter (Interstate 285).
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. It does not border the landline area of 404, only the cellphone area. Additionally, the Yatesville rate center is in area codes 706 and 762, but not adjacent to any other rate centers in ...