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2. Caller ID - Wikipedia

   en.wikipedia.org/wiki/Caller_ID

   Caller-ID system response sounds in various cases: analog, ISDN and digital PBX Caller identification (Caller ID) is a telephone service, available in analog and digital telephone systems, including voice over IP (VoIP), that transmits a caller's telephone number to the called party's telephone equipment when the call is being set up.

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

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

   In the early 1980s, Bell Labs received a patent for what became AT&T's "Advanced 800 Service", a computer-controlled system where any toll-free number could point to any destination number, such as to a small business local number instead of a special InWATS line, and an itemized bill generated only for the calls the business actually received.

4. US West - Wikipedia

   en.wikipedia.org/wiki/US_West

   US West Communications was the first local telephone company to offer Caller ID service in 1991, nearly four years before any other local telco could do so. They were the first U.S. telco to upgrade their PSTN to electronic switching before 1990 and they were the first to offer residential and business ISDN and later, DSL services to their ...

5. List of mobile virtual network operators in the United States

   en.wikipedia.org/wiki/List_of_mobile_virtual...

   Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.

6. AOL Plans - AOL Help

   help.aol.com/articles/aol-advantage-plans

   Need more information? Check out the AOL plans below to see what products and services are included. If you’re interested in purchasing a plan that includes dialup service or would like additional information, please call 1-800-827-6364 (Mon-Fri: 8am-12am ET; Sat: 8am-10pm ET) AOL Live Support Plus

7. AT&T Communications - Wikipedia

   en.wikipedia.org/wiki/AT&T_Communications

   AT&T Phone includes Caller ID, Call Blocking, Anonymous Call Blocker, and many other calling features. AT&T Phone was first available in Detroit, on January 22, 2008. [ 14 ] This service is separate from their POTS based offerings (Long Distance, 1010ATT/1010288, Intra-Lata, and non-VOIP landlines)

8. Long-distance calling - Wikipedia

   en.wikipedia.org/wiki/Long-distance_calling

   For example, 10-10-288 for AT&T. Area code 700 , rarely used, is reserved for carrier-specific services; each carrier places a recorded self-identification message on 1-700-555-4141 to allow a subscriber to identify the default InterLATA carrier for their line.

9. Line information database - Wikipedia

   en.wikipedia.org/wiki/Line_Information_DataBase

   In the US, caller ID name information is not transmitted from the originating office to the destination office. It is the terminating carrier that is responsible for providing the caller ID information to its customers. The carrier performs a database lookup using the caller's telephone number to obtain the name information for the caller ID ...