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  2. Richest and poorest area codes in the US - AOL

    www.aol.com/article/finance/2017/12/08/richest...

    A phone number communicates a lot --and if you dig a little deep, an area code contains ... To find out the 25 poorest and richest area codes, GOBankingRates used the 2015 Census Community Survey ...

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

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

    The North American Numbering Plan (NANP) divides the territories of its members into geographic numbering plan areas (NPAs). 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.

  4. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    The first area codes without a 1 or 0 as the middle digit were area code 334 in Alabama and area code 360 in Washington, which both began service on January 15, 1995. This was followed quickly by area code 520 serving Arizona on March 19, 1995.

  5. Telephone number pooling - Wikipedia

    en.wikipedia.org/wiki/Telephone_number_pooling

    Public resistance to the introduction of new area codes, whether as overlay complexes (which allowed customers to keep their existing numbers, but broke seven-digit local calling) or by area code splits (where the area code of existing numbers was changed), prompted the FCC and state commissions to introduce thousands-block number pooling, i.e. the allocation of number space in blocks of only ...

  6. Area codes 304 and 681 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_304_and_681

    Area codes 304 and 681 are telephone area codes in the North American Numbering Plan (NANP) for the entirety of the U.S. state of West Virginia. The numbering plan area was established in October 1947 with area code 304, as one of the eighty-six original North American area codes. Area code 681 was added to the same area in an overlay plan that ...

  7. ONS Open Geography Portal - Wikipedia

    en.wikipedia.org/wiki/ONS_Open_Geography_Portal

    Register of Geographic Codes (RGC) - the definitive list of UK statistical geographies. [ 5 ] ONS UPRN Directory (ONSUD) for Great Britain - relates the Unique Property Reference Number (UPRN) for each GB address from AddressBase® Epoch 65 to a range of current statutory administrative, electoral, health and other statistical geographies.

  8. GSS coding system - Wikipedia

    en.wikipedia.org/wiki/GSS_coding_system

    GSS refers to the Government Statistical Service of which ONS is part. GSS codes replaced a previous system called ONS codes from January 2011. [1] [2] ONS codes were hierarchical whereas in GSS codes there is no relation between the code for a lower-tier area and the corresponding parent area.

  9. 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.