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  2. Category:Telephone numbers in the United States - Wikipedia

    en.wikipedia.org/wiki/Category:Telephone_numbers...

    Telephone directory publishing companies of the United States‎ (11 P) Pages in category "Telephone numbers in the United States" The following 69 pages are in this category, out of 69 total.

  3. List of North American Numbering Plan area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_North_American...

    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.

  4. 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]

  5. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    1. International access. 011. List of dialing codes. The North American Numbering Plan ( NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the telephone country code 1. Some North American countries, most notably ...

  6. List of mobile network operators in the United States

    en.wikipedia.org/wiki/List_of_mobile_network...

    This is a list of mobile network operators (MNOs) in the United States. The Cellular Telecommunications & Internet Association (CTIA), lists approximately 30 facilities-based wireless service providers in the United States as members. Competitive Carriers Association (CCA) has over 100 members. [1]

  7. List of emergency telephone numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_emergency...

    112 and 911 redirect to 110 on mobile phones and telephones that are present at all United States military installations. Jordan: 911: Mobile phones – 112. Kazakhstan: 112: Police – 102; Ambulance – 103; Fire – 101; Gas leaks – 104. Democratic People's Republic of Korea: local numbers only [32] 8119 [33] Republic of Korea: 112: 119

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