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  2. Check verification service - Wikipedia

    en.wikipedia.org/wiki/Check_verification_service

    The routing number verification can provide the bank's name, address for processing, and phone number. 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 ...

  3. Automatic number identification - Wikipedia

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

    Modern toll-free telephone numbers, which generate itemized billing of all calls received instead of relying on the special fixed-rate trunks of the Bell System's original Inward WATS service, depend on ANI to track inbound calls to numbers in special area codes such as +1-800, 888, 877, 866, 855, 844, and 833 with 822 reserved for future toll free use (United States and Canada), 1800 ...

  4. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_Code

    The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...

  5. Telephone numbers in Palau - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Palau

    LIST OF AREA CODES [1]; Prefix Location +680 544 xxxx: Aimeliik State +680 587 xxxx: Airai State +680 277 xxxx: Angaur State +680 876 xxxx: Kayangel State +680 488 xxxx: Koror State +680 654 xxxx

  6. Toll-free telephone number - Wikipedia

    en.wikipedia.org/wiki/Toll-free_telephone_number

    Many toll-free numbers are not available from cell phones (usually blocked by the cell phone provider rather than by the provider of the toll-free number, in an effort to prevent low-price competition from calling card providers). Some toll-free numbers are not available from phones listed by the owner of the number, including many payphones ...

  7. Toll-free telephone numbers in the North American Numbering ...

    en.wikipedia.org/wiki/Toll-free_telephone...

    Toll-free telephone numbers in the North American Numbering Plan have the area code prefix 800, 833, 844, 855, 866, 877, and 888.Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future.

  8. Personal unblocking key - Wikipedia

    en.wikipedia.org/wiki/Personal_unblocking_key

    If the wrong PIN is entered more than three times, the SIM card will become locked. It can be unlocked by entering the PUK code provided by the mobile service provider, [1] which may be available on the SIM card's packaging, the contract, or provided by customer service after identity verification. After the PUK code is entered, the PIN must be ...

  9. Automatic number announcement circuit - Wikipedia

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

    Many area codes reserved 999; 320 was also formerly reserved in Bell Canada territory. Other carrier-specific North American test numbers include 555-XXXX numbers (such as 555–0311 on Rogers Communications in Canada) or vertical service codes, such as *99 on Cablevision/Optimum Voice in the United States.