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Telephone number verification. Telephone number verification (or validation) services are online services used to establish whether a given telephone number is in service. They may include a form of Turing test to further determine if a human answers or answering equipment such as a modem, fax, voice mMail or answering machine.
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.
Mobile telephone numbers. [1][2] In Vietnam, mobile phone numbers follow the format 09x-xxxxxxx or new prefixes: 03x, 05x, 07x, 08x. The first 0 is the trunk code. The next 2 digits (3x, 5x, 7x, 8x or 9y) specify the mobile phone operator. Some mobile phone operators have been given more than one operator code. In Circular No. 22/2014/TT-BTTTT ...
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 ...
979 – Universal International Premium Rate Service (UIPRS); (formerly assigned to Abu Dhabi, now part of 971 United Arab Emirates) 98 – Iran. 990 – unassigned. 991 – unassigned (formerly used for International Telecommunications Public Correspondence Service) 992 – Tajikistan.
Some routing number verification systems use an algorithm to validate the routing number, rather than cross reference the results in a database. Routing number verification is limited to verifying the bank name, address and phone number and cannot determine if the checking account is valid of perform funds verification.
Numbers starting with '3' were introduced when '2' for fixed lines started running out. Cell phone numbers remain eight-digit. The number '6' started to be used when numbers started with '9' were running out. In May 2008, cellular phone numbers with '5' as the beginning were also introduced.
Automatic number identification (ANI) [1][2] is a feature of a telecommunications network for automatically determining the origination telephone number on toll calls for billing purposes. Automatic number identification was originally created by the American Telephone and Telegraph Company (AT&T) for long distance service in the Bell System ...