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  2. Telephone numbers in Hong Kong - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Hong_Kong

    1879xxx – Public service, charity hotline; 1880 – Hong Kong Jockey Club Customer Service; 1881 to 1889 – Hong Kong Jockey Club phone gambling (Telebet) 189 – Disaster Response / Disaster Recovery; 19 – Test code / routing code; 200 – Telephone card access code; 201xxxxx to 206xxxxx – Fixed-line telephone; 207, 208, 209 ...

  3. List of mobile telephone prefixes by country - Wikipedia

    en.wikipedia.org/wiki/List_of_mobile_telephone...

    Mobile phones use geographic area codes (two digits): after that, all numbers assigned to mobile service have nine digits, starting with 6, 7, 8 or 9 (example: 55 15 99999–9999). 90 is not possible, because collect calls start with this number. [5] xx 7: xx 8: xx 9: British Indian Ocean Territory +246: 380 7 387 British Virgin Islands +1: 284: 10

  4. National conventions for writing telephone numbers - Wikipedia

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

    When dialing a mobile number, "xxx" represents the mobile operator code. All mobile operator codes begin with the number 07. "zzzzzzz" represents the main telephone number of seven digits. The country code for Sri Lanka is 94, so the format becomes "+94 XX Y ZZZZZZ" for landlines and the format becomes "+94 XX ZZZZZZZ" for mobile numbers. [4]

  5. E.164 - Wikipedia

    en.wikipedia.org/wiki/E.164

    The presentation of a telephone number with the plus sign indicates that the number should be dialed with an international calling prefix, in place of the plus sign. The number is presented starting the country calling code. This is called the globalized format of an E.164 number, and is defined in the Internet Engineering Task Force RFC 2806. [6]

  6. International mobile subscriber identity - Wikipedia

    en.wikipedia.org/wiki/International_Mobile...

    This is mainly important for international mobile roaming. Outside North America, the IMSI is converted to the Mobile Global Title (MGT) format, standard E.214, which is similar to an E.164 number. E.214 provides a method to convert the IMSI into a number that can be used for routing to international SS7 switches.

  7. Mobile country code - Wikipedia

    en.wikipedia.org/wiki/Mobile_country_code

    Mobile country code Country ISO 3166 Mobile network codes National MNC authority Remarks 289 A Abkhazia GE-AB List of mobile network codes in Abkhazia MCC is not listed by ITU 412 Afghanistan AF List of mobile network codes in Afghanistan 276 Albania AL List of mobile network codes in Albania 603 Algeria DZ List of mobile network codes in Algeria 544 American Samoa (United States of America ...

  8. Telephone numbers in Singapore - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Singapore

    Until 1985, subscribers' telephone numbers in Singapore were five and six digits. Five digits were introduced in 1960s, whereas 5-digit and 6-digit phone numbers were introduced in 1960s as fixed lines grew, but in that year, these changed to seven digits as the introduction of new towns arose (Tampines, Jurong East, Bukit Batok, Yishun and Hougang) and a large number of new numbers were required.

  9. HTC Global Services - Wikipedia

    en.wikipedia.org/wiki/HTC_Global_Services

    HTC Global Services Inc., established in 1990 and headquartered in Troy, Michigan, United States, is a provider of information technology and business process services. [ 4 ] History