The original North American area codes were established by the American Telephone and Telegraph Company (AT&T) in 1947, after the demonstration of regional...

country codes within the international E.164 specifications by the International Telecommunication Union. Original North American area codes List of North American...

these codes were actually installed. Projected future activation date List of future North American area codes Original North American area codes Telephone...

of Rhode Island. 401 is one of the original North American area codes, which were established in 1947. Area code 401 is not projected to exhaust its...

Pennsylvania. Area code 215 was one of the original North American area codes established in 1947, while 267 and 445 are overlay codes for the same numbering...

Area codes 213 and 323 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of California. They are assigned in an...

numbering plan area (NPA) comprises the cities of Portland, Salem, and Astoria. Area code 503 was one of the original North American area codes of 1947, assigned...

including Las Vegas, in the U.S. state of Nevada. Area code 702 was one of the original North American area codes established in October 1947, and serviced the...

Area codes 716 and 624 are telephone area codes in the North American Numbering Plan (NANP) for Buffalo, Niagara Falls, and four surrounding counties...

Area codes 202 and 771 are telephone area codes in the North American Numbering Plan (NANP) for Washington, D.C. Area code 202 was one of the original...

Area codes 415 and 628 are telephone area codes in the North American Numbering Plan (NANP) for the city of San Francisco and its northern suburbs in...

York. Area code 315 was installed as one of the original North American area codes in 1947, while area code 680 was added to the numbering plan area (NPA)...

Saskatchewan. Area code 306 is one of the original North American area codes assigned in 1947. Area codes 639 and 474 were added to the numbering plan area in creation...

S. state of Wyoming. It is one of the 86 original North American area codes created by the American Telephone and Telegraph Company (AT&T) in 1947. Because...

Area codes 801 and 385 are telephone area codes in the North American Numbering Plan (NANP) serving Salt Lake City and the four surrounding counties of...

Area codes 920 and 274 are telephone area codes in the North American Numbering Plan (NANP) for a large area of eastern Wisconsin. Area code 920 was created...

Area codes 570 and 272 are telephone area codes in the North American Numbering Plan (NANP) for the northeast quadrant of the U.S. state of Pennsylvania...

province of Quebec. Area code 514 was one of the original North American area codes assigned by AT&T in 1947. The original numbering plan area (NPA) was split...

The area code is one of the nine original North American area codes assigned to Canada in 1947. Area code 604 is one of the original 86 area codes assigned...

establishment of the original North American area codes in 1947. The numbering plan area is also served by area codes 587, 825, and 368, which form a...

as Brookline, Cambridge, Newton and Quincy. Area code 617 is one of the original North American area codes created in October 1947, when it served the...

Area codes 212, 646, and 332 are area codes in the North American Numbering Plan (NANP) for most of the borough of Manhattan in New York City. By area...

Area codes 217 and 447 are telephone area codes in the North American Numbering Plan (NANP) for much of the central part of the U.S. state of Illinois...

of the original North American area codes created in 1947, while 534 was added in 2010 as an additional code for the same numbering plan area to form...

of Washington and Westmoreland counties. The area code was one of the original North American area codes created in 1947, when it was assigned to the...

nearly two million people. Area code 717 was one of the original North American area codes created in 1947, while area code 223 was added to the modern...

eastern part of the U.S. state of Nebraska. Area code 402 was one of the original North American area codes created in 1947, when it was assigned to the entire...

Area codes 303, 720 and 983 are telephone area codes in the North American Numbering Plan for the north-central portion of the U.S. state of Colorado...

numbering plan area was established in October 1947 with area code 304, as one of the eighty-six original North American area codes. Area code 681 was added...

Area code 613 is one of the 86 original North American area codes assigned in October 1947. Area code 343 was assigned to the numbering plan area in...