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  2. Telephone numbers in China - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_China

    124x – Carrier Identification Code (formerly 190/196/197, abolished in 2018, to create space for mobile phone numbers.) 125xx – Premium service of China Mobile (e.g. 12580 for China Mobile's Directory assistance) 179xx + target number followed – VoIP (e.g. 17901-133-0000-0000, 1790 for China Telecom, 1791 for China Unicom, and 1795 for ...

  3. Telephone number verification - Wikipedia

    en.wikipedia.org/wiki/Telephone_number_verification

    A JavaScript function can check to see if a phone number is a valid format, i.e., is numeric, starts with a valid set of numbers ("0" for local, or an international dialing prefix followed by a valid country code and is not too short to be a phone number. At first a JavaScript function is used to clear out any spacer characters.

  4. List of mobile telephone prefixes by country - Wikipedia

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

    10. NANP member. Argentina. +54. 9/15. 10. All carriers: Claro, Movistar, Personal, Tuenti. 15 before the local number but after long distance area code for national calls (0 11 15 xxxx-xxxx) and 9 placed after the international access code excluding the 15 for international calls (+54 9 11 xxxx-xxxx). Armenia.

  5. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    376 – Andorra (formerly 33 628) 377 – Monaco (formerly 33 93) 378 – San Marino (interchangeably with 39 0549; earlier was allocated 295 but never used) 379 – Vatican City (assigned but uses 39 06698). 38 – formerly assigned to Yugoslavia until its break-up in 1991. 380 – Ukraine. 381 – Serbia.

  6. International mobile subscriber identity - Wikipedia

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

    Website. www .itu .int /rec /T-REC-E .212. The international mobile subscriber identity ( IMSI; / ˈɪmziː /) is a number that uniquely identifies every user of a cellular network. [ 1] It is stored as a 64-bit field and is sent by the mobile device to the network. It is also used for acquiring other details of the mobile in the home location ...

  7. 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 ...

  8. Signal (software) - Wikipedia

    en.wikipedia.org/wiki/Signal_(software)

    The number does not have to be the same as on the device's SIM card; it can also be a VoIP number [140] or a landline as long as the user can receive the verification code and have a separate device to set up the software. A number can only be registered on one mobile device at a time. [142] Account registration requires an iOS or Android device.

  9. Whoscall - Wikipedia

    en.wikipedia.org/wiki/Whoscall

    Whoscall is a mobile application that offers caller identification services. It was developed by Gogolook Co., Ltd., a listed company in Taiwan. The function of Whoscall is to identify incoming calls, detect scam/harassment numbers, and filter spam text messages, blocking them accordingly. Its name is derived from a shorter version of the ...