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  2. 30 Scam Phone Numbers To Block and Area Codes To Avoid - AOL

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

    Look at the area code: Start by comparing the phone number’s area code to the list of area codes you should never answer. If it’s on the list, there’s a good chance there’s a scammer on ...

  3. Avoid Answering Calls from These Area Codes: Scam Phone ...

    www.aol.com/lifestyle/avoid-answering-calls-area...

    All it takes is a quick glance to know if the call is for real or not. The post Avoid Answering Calls from These Area Codes: Scam Phone Numbers Guide appeared first on Reader's Digest.

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

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

    Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.

  5. Toll-free telephone numbers in the North American Numbering ...

    en.wikipedia.org/wiki/Toll-free_telephone...

    The first automated toll-free telephone numbers were assigned with area code 800, created as inbound Wide Area Telephone Service (InWATS) in 1966 (U.S. intrastate) and 1967 (interstate). These terminated on special fixed-rate trunks which would accept calls from a specified calling area with either no limit or a specific maximum number of hours ...

  6. N11 code - Wikipedia

    en.wikipedia.org/wiki/N11_code

    An N11 code (pronounced Enn-one-one) is a three-digit dialing code used in abbreviated dialing in the North American Numbering Plan (NANP). The mnemonic N stands for the digits 2 through 9 and thus the syntax stands for the codes 211 , 311 , 411 , 511 , 611 , 711 , 811 , and 911 .

  7. Original North American area codes - Wikipedia

    en.wikipedia.org/wiki/Original_North_American...

    In 1951, the number of area codes grew to ninety: the State of New York gained area code 516 on Long Island, and Southern California received area code 714, to reduce the numbering plan area of Los Angeles. [23] Area code handbook issued by many telephone companies in 1962 to promote the newly introduced direct distance dialing.

  8. 6-1-1 - Wikipedia

    en.wikipedia.org/wiki/6-1-1

    While 6-1-1 was in use to call repair service in some areas from as early as the 1930s, other codes were also used, the most common being 114 (with 113 used for information). A decision to standardize on 6-1-1 (and 4-1-1 for information) nationwide was made in the 1960s, but the use of 114 was still widespread in the 1970s, and into the 1980s ...

  9. Routing in the PSTN - Wikipedia

    en.wikipedia.org/wiki/Routing_in_the_PSTN

    For example, in the number (301) 555-1212, 301 is the area code and 555 is the prefix. (The area code is sometimes known as an "NPA," and the area-code and prefix combination is known as an "NPA-NXX.") In the United States, prior to 2021, in some locations, if the call was between two terminals in the same local area (or, two terminals on the ...