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  2. Reverse telephone directory - Wikipedia

    en.wikipedia.org/wiki/Reverse_telephone_directory

    In United States, landline phone subscribers can pay a small fee to exclude their number from the directory. This service is available as an unlisted number, or an unpublished number. An unlisted number is excluded from public directories. An unpublished number is also excluded from directory assistance services, such as 411.

  3. 555 (telephone number) - Wikipedia

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

    The telephone number prefix 555 is a central office code in the North American Numbering Plan, used as the leading part of a group of 10,000 telephone numbers, 555-XXXX, in each numbering plan area (NPA) (area code).

  4. Premium-rate telephone number - Wikipedia

    en.wikipedia.org/wiki/Premium-rate_telephone_number

    Due to the number's association with adult services (Telkom's dial-up Internet service, Telkomnet Instan at 080989999 being a major exception) premium-rate phone services have come under public scrutiny and regulatory crackdown, most notably in May 2015 following rash of spam text messages enticing mobile phone users to dial them.

  5. Mobile number portability - Wikipedia

    en.wikipedia.org/wiki/Mobile_number_portability

    Number lookup services. Service providers and carriers who route messages and voice calls to MNP-enabled countries might use home location register (HLR) query services to find out the correct network of a mobile phone number.

  6. Automatic number announcement circuit - Wikipedia

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

    ANAC announces the caller's own number; the reverse lookup gives the directory name for a listed telephone number input by the user. 555-1313 is one of the rare uses of the 555 exchange for other than the standard 555-1212 directory information line. United Kingdom. 17070, Openreach Linetest Facilities

  7. International Mobile Equipment Identity - Wikipedia

    en.wikipedia.org/wiki/International_Mobile...

    The International Mobile Equipment Identity (IMEI) is a number, usually unique, to identify 3GPP and iDEN mobile phones, as well as some satellite phones.It is usually found printed inside the battery compartment of the phone, but can also be displayed on-screen on most phones by entering *#06# MMI Supplementary Service code on the dialpad, or alongside other system information in the settings ...

  8. Microsoft DNS - Wikipedia

    en.wikipedia.org/wiki/Microsoft_DNS

    DNS lookup client. Applications perform DNS lookups with the aid of a DLL. They call library functions in the DLL, which in turn handle all communications with DNS servers (over UDP or TCP) and return the final results of the lookup back to the applications.

  9. Caller ID - Wikipedia

    en.wikipedia.org/wiki/Caller_ID

    AT&T starts their negotiations for CNAM dip fees at about $.004 per lookup. OpenCNAM fees are a bit more expensive, up to $.0048 per lookup. To avoid such charges, some carriers will report the name as "unavailable", or will report the name as "(city), (state)" based on the phone number