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2. Telephone number verification - Wikipedia

   en.wikipedia.org/wiki/Telephone_number_verification

   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.

3. North American Numbering Plan - Wikipedia

   en.wikipedia.org/wiki/North_American_Numbering_Plan

   Requiring 1 to be dialed before the full number in some areas provided for area codes of the form N10, such as 210 in the San Antonio, Texas, area and 410 in eastern Maryland. Therefore, someone calling from San Jose, California , to Los Angeles before the change would have dialed 213-555-0123 and after the change 1-213-555-0123, which ...

4. 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 ...

5. 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 ...

6. List of mobile telephone prefixes by country - Wikipedia

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

   268 7xx. 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).

7. 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.

8. 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 ...

9. AOL Mail

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   You can find instant answers on our AOL Mail help page. Should you need additional assistance we have experts available around the clock at 800-730-2563.