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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]
Numbering plan areas and area codes of Texas with numbering plan area 281/346/713/832 highlighted. Area codes 713, 281, 832, and 346 are telephone area codes in the North American Numbering Plan (NANP) forming an overlay complex for Houston, Texas and its environs. 713 is one of the original four area codes established for Texas in 1947.
484, 835. 215, 717 (1994) Southeastern Pennsylvania outside Philadelphia, including the Lehigh Valley but excluding all but northernmost Bucks County and the eastern half of Montgomery County. 717 † ‡. 223. South Central Pennsylvania, including Harrisburg, Lancaster, and York . 724. 878.
this was the first part of North America to have its code changed three times: from 213 to 714 1951: to 619 in 1982, and to 760 in 1997. was to have originally split off the portion of 760 serving San Diego County to a new 442 area code in late 2008/early 2009; that plan was cancelled. 2009: overlaid by 442. 761.
The need for new phone numbers in area codes 215/267 was delayed until 2018. Area code 445 was activated as an additional overlay code on February 3, 2018. [3] This had the effect of assigning 23 million telephone numbers to a service territory of four million people. Despite Philadelphia's continued growth, 215/267/445 is nowhere near exhaustion.
This is a list of area codes in the U.S. state of Texas. The date of establishment of each area code is indicated in parentheses: [1] 210: San Antonio area; overlays with 726 (November 1, 1992) 214: Dallas area, overlays with 469, 972, and 945 (October 1947) 254: Waco, Killeen, Temple, Belton, Stephenville and North Texas (May 25, 1997) 281 ...
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.
North American area code 936 is a state of Texas telephone area code for numbers in the Nacogdoches - Huntsville area, as well as a few outer portions of the Houston metropolitan area. It was created February 19, 2000, in a code-split from area code 409. It primarily serves the Deep East Texas area. Counties served by this area code: Towns and ...