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2. Toll-free telephone numbers in the North American Numbering Plan

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

   Some are not accessible from pay phones. Calls from pay phones assess the toll-free owner an additional fee in the U.S., as mandated by the FCC. Although toll-free numbers are not accessible internationally, many phone services actually call through the U.S., and in this case the toll-free numbers become available.

3. Long-distance calling - Wikipedia

   en.wikipedia.org/wiki/Long-distance_calling

   Interstate long-distance or inter-LATA interstate long-distance, the most common group, is the one for which long-distance carriers are usually chosen by telephone customers. Another form of long-distance call, increasingly relevant to more U.S. states, is known as an inter-LATA intrastate long-distance call. This refers to a calling area ...

4. SBC Long Distance - Wikipedia

   en.wikipedia.org/wiki/SBC_Long_Distance

   SBC Long Distance is a separate subsidiary than AT&T Communications, the incumbent long-distance carrier for most of the country acquired in the SBC merger with AT&T. SBC Long Distance started in 1996 as Southwestern Bell Communications Services, Inc. , created as a result of the Telecommunications Act of 1996 which allowed the Baby Bells to ...

5. Telephone numbering plan - Wikipedia

   en.wikipedia.org/wiki/Telephone_numbering_plan

   This concept was first developed in the planning for a nationwide numbering plan for Operator Toll Dialing and direct distance dialing (DDD) in the Bell System in the United States in the 1940s, a system that resulted in the North American Numbering Plan for World Zone 1. [4] AT&T divided the United States and Canada into numbering plan areas ...

6. AT&T Communications - Wikipedia

   en.wikipedia.org/wiki/AT&T_Communications

   Customers who subscribe to both AT&T Phone and U-verse TV get features such as call history on channel 9900, which displays the last 100 missed and answered calls on the customer's TV, and "Click to Call" from the TV history. AT&T Phone includes Caller ID, Call Blocking, Anonymous Call Blocker, and many other calling features. AT&T Phone was ...

7. 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.