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

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

    To make it easier for you, here are the best free reverse phone lookup sites out there. 1. Instant Checkmate. Instant Checkmate’s database is linked to every state agency and public...

  3. Reverse telephone directory - Wikipedia

    en.wikipedia.org/wiki/Reverse_telephone_directory

    A reverse telephone directory (also known as a gray pages directory, criss-cross directory or reverse phone lookup) is a collection of telephone numbers and associated customer details. However, unlike a standard telephone directory, where the user uses customer's details (such as name and address) in order to retrieve the telephone number of ...

  4. Telephone directory - Wikipedia

    en.wikipedia.org/wiki/Telephone_directory

    Telephone directory. A telephone directory, commonly called a telephone book, telephone address book, phonebook, or the white and yellow pages, is a listing of telephone subscribers in a geographical area or subscribers to services provided by the organization that publishes the directory. Its purpose is to allow the telephone number of a ...

  5. Local number portability - Wikipedia

    en.wikipedia.org/wiki/Local_number_portability

    Local number portability (LNP) for fixed lines, and full mobile number portability (FMNP) for mobile phone lines, refers to the ability of a "customer of record" of an existing fixed-line or mobile telephone number assigned by a local exchange carrier (LEC) to reassign the number to another carrier ("service provider portability"), move it to ...

  6. Call detail record - Wikipedia

    en.wikipedia.org/wiki/Call_detail_record

    The record contains various attributes of the call, such as time, duration, completion status, source number, and destination number. It is the automated equivalent of the paper toll tickets that were written and timed by operators for long-distance calls in a manual telephone exchange.

  7. Mobile phone tracking - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone_tracking

    Mobile phone tracking is a process for identifying the location of a mobile phone, whether stationary or moving. Localization may be affected by a number of technologies, such as the multilateration of radio signals between (several) cell towers of the network and the phone or by simply using GNSS. To locate a mobile phone using multilateration ...