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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 mMail or answering machine .

  3. How to Do a Free Reverse Phone Lookup & the 8 Best ... - AOL

    www.aol.com/finance/free-reverse-phone-lookup-8...

    Have you ever wondered who owns that phone number? You know, the one that keeps calling you and won't leave you alone? Try a free reverse phone lookup site to find out who's calling.

  4. National conventions for writing telephone numbers - Wikipedia

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

    Special rate numbers, such as free phone/toll free and premium rate are usually grouped: Freephone: 1800 BB BB BB or (spoken as one-eight-hundred) Local rate: 1850 BB BB BB (eighteen-fifty) 1550 BB BB BB (read as fifteen-fifty) However, for memorability, this is not consistently adhered to.

  5. List of North American Numbering Plan area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_North_American...

    Codes 880 through 882 were used (until 1 April 2004) to allow international customers to access toll-free numbers they otherwise could not by paying the international portion of the toll. 880 was paired with 800, 881 with 888, and 882 with 877. 888: toll-free telephone service: March 1, 1996: created; 889: not in use; available for toll-free ...

  6. Automatic number identification - Wikipedia

    en.wikipedia.org/wiki/Automatic_number...

    Automatic number identification (ANI) 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 , [3] [4 ...

  7. Check verification service - Wikipedia

    en.wikipedia.org/wiki/Check_verification_service

    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. It can be valuable in locating fraudulent checks or drafts, and in getting contact information for the bank for merchant funds verification or account validation.