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Regional Bell Operating Company
The Regional Bell Operating Companies (RBOC) are the result of ''United States v. AT&T'', the U.S. Department of Justice antitrust suit against the former American Telephone & Telegraph Company (later known as AT&T Corp.). On January 8, 1982, AT&T Corp. settled the suit and agreed to divest its local exchange service operating companies. Effective January 1, 1984, AT&T Corp.'s local operations were split into seven independent ''Regional Bell Operating Companies'' known as "Baby Bells". RBOCs were originally known as ''Regional Holding Companies'' (RHCs). Currently, three companies have the RBOCs as predecessors. They are AT&T Inc., Verizon, and CenturyLink. Some other companies are holding on smaller segments of the companies.
=="Baby Bells"==
After the Modification of Final Judgment, the resulting ''Baby Bells'' were originally:
* Ameritech
* Bell Atlantic
* BellSouth
* NYNEX
* Pacific Telesis
* Southwestern Bell
* US West
Prior to 1984, AT&T Corp. also held investments in two smaller and otherwise independent companies, Cincinnati Bell and Southern New England Telephone (SNET). Following the 1984 breakup, these became fully independent as well. All nine local-exchange holding companies were assigned a share of the rights to the Bell trademark.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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