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  2. List of mobile telephone prefixes by country - Wikipedia

    en.wikipedia.org/wiki/List_of_mobile_telephone...

    Mobile phones use geographic area codes (two digits): after that, all numbers assigned to mobile service have nine digits, starting with 6, 7, 8 or 9 (example: 55 15 99999–9999). 90 is not possible, because collect calls start with this number.

  3. Area codes 416, 647, and 437 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_416,_647,_and_437

    Area codes 647 and 437 are additional area codes for the same numbering plan area (NPA), forming an overlay numbering plan. The incumbent local exchange carrier in the numbering plan area is Bell Canada. Almost all Toronto Bell Canada landlines have area code 416, with 647-numbers allocated disproportionately to a growing mobile telephone ...

  4. List of Ohio area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Ohio_area_codes

    In 2016, area code 614 was overlaid with 380 in the Columbus/Central Ohio area for the same reason. In 2020, 326 was added as an all services overlay for 937. Area code 283 was added as an overlay for 513 on April 28, 2023. [2] [3] Area code 436 went into service on March 1, 2024, as an overlay of 440. [4]

  5. Telephone exchange names - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange_names

    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]

  6. Mobile network codes in ITU region 3xx (North America)

    en.wikipedia.org/wiki/Mobile_network_codes_in...

    This list contains the mobile country codes and mobile network codes for networks with country codes between 300 and 399, inclusively – a region that covers North America and the Caribbean. Guam and the Northern Mariana Islands are included in this region as parts of the United States.

  7. Seven-digit dialing - Wikipedia

    en.wikipedia.org/wiki/Seven-digit_dialing

    Washington, D.C. (area code 202) to adjacent areas of Maryland (area code 301) and Virginia (area code 703), discontinued on October 1, 1990, to allow assignment of a code in all three area codes. Hull from Ottawa (before 2006, as every Ottawa-Hull local number originally was reserved in both area code 613 and 819 ). [ 1 ]

  8. Area codes 519, 226, 548, and 382 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_519,_226,_548...

    Area code 519 was the initial code of the numbering plan area (NPA). It was created in 1953 from the western portion of area code 416 and the southwestern portion of 613. The numbering plan area is mostly bounded by area code 905, except for Simcoe County which is bordered by 705. Area code 226 was added to the numbering plan area in 2006, and ...

  9. Area codes 204, 431, and 584 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_204,_431,_and_584

    The number exhaustion was caused by the proliferation of cell phones, particularly in and around Winnipeg. In July 2010, the Canadian Radio-television and Telecommunications Commission approved a province-wide overlay with area code 431 for implementation in November 2012. [ 1 ]