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  2. Telephone number verification - Wikipedia

    en.wikipedia.org/wiki/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 mail or answering machine .

  3. Fictitious telephone number - Wikipedia

    en.wikipedia.org/wiki/Fictitious_telephone_number

    Telephone numbers starting with the digits 555 are assigned to subscribers as ordinary numbers. Hungarian taxi company Tele5 Taxi uses 555-5555 as a vanity number, [22] while at least one company specializing in vanity numbers [23] sells cell phone numbers starting with the digits 555 for a premium rate, capitalizing on their fame in American ...

  4. What You Need to Know About Phone Scams - AOL

    www.aol.com/know-phone-scams-180248742.html

    Scammers know how to fake a phone number Kerskie describes a scam where a client received a spoof call from what he thought was his daughter’s phone. The caller claimed his daughter was in ...

  5. IMSI-catcher - Wikipedia

    en.wikipedia.org/wiki/IMSI-catcher

    An international mobile subscriber identity-catcher, or IMSI-catcher, is a telephone eavesdropping device used for intercepting mobile phone traffic and tracking location data of mobile phone users. [1] Essentially a "fake" mobile tower acting between the target mobile phone and the service provider's real towers, it is considered a man-in-the ...

  6. SMS spoofing - Wikipedia

    en.wikipedia.org/wiki/SMS_spoofing

    SMS spoofing is a technology which uses the short message service (SMS), available on most mobile phones and personal digital assistants, to set who the message appears to come from by replacing the originating mobile number (Sender ID) with alphanumeric text. Spoofing has both legitimate uses (setting the company name from which the message is ...

  7. 555 (telephone number) - Wikipedia

    en.wikipedia.org/wiki/555_(telephone_number)

    The 555 exchange is not reserved in area codes used for toll-free phone numbers. This led to the video game The Last of Us accidentally including the number to a phone-sex operator. [9] The number "555-2368" (or 311-555-2368) is a carryover from the "EXchange 2368" ("Exchange CENTral") number common in telephone advertisements as early as the ...