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

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

    Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits. A numbering plan area with multiple area codes is called an overlay. Area codes are also assigned for non-geographic purposes.

  3. List of United States telephone companies - Wikipedia

    en.wikipedia.org/wiki/List_of_United_States...

    Telephone and Data Systems, (through its subsidiary TDS) serves mainly rural areas in parts of 36 states. [ 3 ] Altafiber , formerly known as Cincinnati Bell, which serves the Cincinnati metropolitan area , and Hawaii (due to its ownership of Hawaiian Telcom ). [ 4 ]

  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. Lists of North American area codes - Wikipedia

    en.wikipedia.org/wiki/Lists_of_North_American...

    The largest telephone numbering plan in North American is the North American Numbering Plan (NANP), serving 25 regions or countries. Other countries maintain an autonomous numbering plan with distinct country codes within the international E.164 specifications by the International Telecommunication Union. Original North American area codes

  6. List of telecommunications companies in the Americas

    en.wikipedia.org/wiki/List_of_telecommunications...

    A telecommunications company (historically known as a telephone company) is a company which provides broadband and/or telephony services. The telecommunications companies of the Americas are listed below:

  7. Telephone numbering plan - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbering_plan

    Many mobile handsets automatically add the area code of the set's telephone number for outbound calls, if not dialed by the user. In some parts of the United States, especially northeastern states such as Pennsylvania served by Verizon Communications, the ten-digit number must be dialed. If the call is not local, the call fails unless the ...

  8. 30 Scam Phone Numbers To Block and Area Codes To Avoid - AOL

    www.aol.com/19-dangerous-scam-phone-numbers...

    More than 300 area codes exist in the United States alone which is a target-rich environment for phone scammers. The good news is that scam callers will often show up under common area codes for ...

  9. List of Massachusetts area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Massachusetts_area...

    Numbering plan areas and area codes since May 2001 September 1997 [1] – May 2001 [2] July 1988 [3] – September 1997 [4] [5] October 1947 – July 1988 [6]. Massachusetts is divided into five distinct numbering plan areas (NPAs), which are served by nine area codes in the North American Numbering Plan (NANP), [7] organized as four overlay complexes and a single-area code NPA.

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