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670 was the former country code for the islands; 671: Guam (includes Andersen Air Force Base) July 1, 1997: Created for membership in NANP; 671 was the former country code for the island; 672: British Columbia, and the isolated border town of Hyder, Alaska, US May 4, 2019: overlaid on 604, 250, 778, and 236 [15] 2025: to be overlaid by 257; 673 ...
Area codes 614 and 380 are telephone area codes in the North American Numbering Plan (NANP) for all or part of four counties in central Ohio, surrounding and including the state capital of Columbus. Area code 614 is one of the original area codes assigned for Ohio in 1947, while area code 380 is an overlay code covering the same territory.
Central and southeastern Ohio except Columbus: December 6, 1997: 220: April 22, 2015: 614: Columbus: October 1947: 380: February 27, 2016: 937: Southwestern part of Ohio including Dayton, Springfield, public parts of Wright-Patterson Air Force Base, and areas north and east of the Cincinnati metropolitan area: September 28, 1996: 326: March 8 ...
Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
Finally, they sought the elimination of central office names and letter codes, and introduced all-number calling (ANC). The all-number calling plan increased the number of permissible central office prefixes from 540 to potentially 800, but the first two digits of the central office code were still restricted to the range 2 to 9, and the eight ...
Country codes are defined by the International Telecommunication Union (ITU) in ITU-T standards E.123 and E.164. The prefixes enable international direct dialing (IDD). Country codes constitute the international telephone numbering plan. They are used only when dialing a telephone number in a country or world region other than the caller's.
The buckeye is the Ohio state tree and the Ohio State mascot. ... “Celebration of the Forty-Fifth Anniversary of the First Settlement of Cincinnati and the Miami Country on the 26th Day of ...
The regions shown in blue are in Ohio. Area codes 513 and 283 are telephone area codes in the North American Numbering Plan (NANP) for the southwest of the U.S. state of Ohio, including Cincinnati and surrounding cities, such as Forest Park, Hamilton, Lebanon, West Chester, Mason, Maineville, Middletown, Milford, Norwood, Oxford, Harrison, Cleves, Miamitown and Trenton.