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  1. A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. Telephone numbers are the addresses of participants in a telephone network, reachable by a system of destination code routing.

  2. 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 Mexico, do not participate with the NANP.

    • 1
    • 011
    • +1 NXX NXX-XXXX
  3. A telephone numbering plan is a system used in telecommunications to give telephone numbers to customers and to route telephone calls in a telephone network. A closed numbering plan imposes a fixed length to numbers, such as in North America (10-digit). An open numbering plan may have telephone numbers that vary in length.

  4. Telephone numbers in the Netherlands are administered by the Ministry of Economic Affairs, Agriculture and Innovation of the Netherlands. The telephone numbering plan may be grouped into three general categories: geographical numbers, non-geographical numbers, and numbers for public services.