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  2. 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 ...

  3. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    The second NXX block is the central office code. Permissible numbers exclude easily recognizable codes N11, used for special services. Also called exchange code: XXXX Line number A unique four-digit number for each NPA, from 0000 to 9999: Also called station code

  4. Telephone keypad - Wikipedia

    en.wikipedia.org/wiki/Telephone_keypad

    The use of alphanumeric codes for area codes was abandoned in Europe when international direct dialing was introduced in the 1960s, because, for example, dialing VIC 8900 on a Danish telephone would result in a different number to dialling it on a British telephone. At the same time, letters were no longer placed on the dials/keypads of new ...

  5. Account verification - Wikipedia

    en.wikipedia.org/wiki/Account_verification

    A telephone number can be provided when creating or verifying an account or added to an account to obtain a set of features. During the process of verifying a telephone number, a confirmation code is sent to a phone number specified by a user, for example in an SMS message sent to a mobile phone. As the user receives the code sent, they can ...

  6. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Worldwide distribution of country calling codes. Regions are coloured by first digit. Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks.

  7. Automatic number announcement circuit - Wikipedia

    en.wikipedia.org/wiki/Automatic_number...

    The North American Numbering Plan reserves the exchange (central office) prefixes 958 and 959 for plant testing purposes. [2] Code 959 with three or four additional digits is dedicated for access to office test lines in local exchange carrier and interoffice carrier central offices.

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