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  2. National conventions for writing telephone numbers - Wikipedia

    en.wikipedia.org/wiki/National_conventions_for...

    All telephone numbers in Iran have 11 digits (initial 0 and ten digits). The first two or three digits after the zero are the area code. The possibilities are: (0xx) xxxx xxxx (for landlines), 09xx xxx xxxx (for cellphones) and 099xx xxx xxx (for MVNO). When making a call within the same landline area code, initial 0 plus the area code must be ...

  3. E.164 - Wikipedia

    en.wikipedia.org/wiki/E.164

    E.164 is an international standard (ITU-T Recommendation), titled The international public telecommunication numbering plan, that defines a numbering plan for the worldwide public switched telephone network (PSTN) and some other data networks. E.164 defines a general format for international telephone numbers.

  4. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    01408200952. 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.

  5. E.123 - Wikipedia

    en.wikipedia.org/wiki/E.123

    E.123. E.123 is an international standard by the Telecommunication Standardization Sector of the International Telecommunication Union ( ITU-T ), entitled Notation for national and international telephone numbers, e-mail addresses and Web addresses. [ 1] It provides guidelines for the presentation of telephone numbers, email addresses, and web ...

  6. Telephone number - Wikipedia

    en.wikipedia.org/wiki/Telephone_number

    A telephone number serves as an address for switching telephone calls using a system of destination code routing. [1] Telephone numbers are entered or dialed by a calling party on the originating telephone set, which transmits the sequence of digits in the process of signaling to a telephone exchange. The exchange completes the call either to ...

  7. Telephone numbers in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_the...

    This is used for forty smaller towns which have a mixture of six and five digit local numbers, each type allocated in specific DE blocks*; e.g. in the 01647 area code numbers beginning 24 and 61 have five digits (24xxx and 61xxx; known as 4+5 format) whereas all other DE blocks* within that area code have six digit numbers.

  8. Telephone numbers in the Philippines - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_the...

    The Philippines is assigned an international dialing code of +63 by ITU-T. Telephone numbers are fixed at eight digits for area code 02, and seven digits for area codes from 03X to 09X, with area codes fixed at one, two, or three digits (a six-digit system was used until the mid-1990s; four to five digits were used in the countryside). Mobile ...

  9. Telephone numbers in Papua New Guinea - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Papua...

    Access codes. Country code. +675. International access. 00. Long-distance. None. Telephone numbers in Papua New Guinea consist of mostly seven and some eight digit numbers (fixed), or eight digit numbers (mobile). The international prefix for Papua New Guinea was changed from ‘05’ to ’00’ in 2010.