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. 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.
AT&T Teleholdings, Inc., formerly known as Ameritech Corporation, is an American telecommunications company that arose out of the 1984 AT&T divestiture. Ameritech was one of the seven Regional Bell Operating Companies that was created following the breakup of the Bell System. Ameritech was acquired in 1999 by SBC Communications, which subsequently acquired AT&T Corporation in 2006, becoming the present-day AT&T Inc.
AT&T Wireless Services, founded in 1987 as McCaw Cellular Communications, formerly part of AT&T Corp., was a wireless telephone carrier in the United States, based in Redmond, Washington, and later traded on the New York Stock Exchange under the stock symbol "AWE", as a separate entity from its former parent.
Cincinnati Bell is a regional telecommunications service provider based in Cincinnati, Ohio, United States. It provides landline telephone, fiber-optic Internet, and IPTV services through its subsidiaries Cincinnati Bell Telephone and Hawaiian Telcom, which are the incumbent local exchange carriers for the Cincinnati and Dayton metropolitan areas and Hawaii. Other subsidiaries provide enterprise information technology services and long distance calling.
The breakup of the Bell System was mandated on January 8, 1982, by an agreed consent decree providing that AT&T Corporation would, as had been initially proposed by AT&T, relinquish control of the Bell Operating Companies that had provided local telephone service in the United States and Canada up until that point. This effectively took the monopoly that was the Bell System and split it into entirely separate companies that would continue to provide telephone service. AT&T would continue to be a provider of long-distance service, while the now-independent Regional Bell Operating Companies (RBOCs), nicknamed the 'Baby Bells', would provide local service, and would no longer be directly supplied with equipment from AT&T subsidiary Western Electric.
Nevada Bell Telephone Company, originally Bell Telephone Company of Nevada, is a Nevada telephone provider and it was the Bell System's telephone provider in Nevada. It only provides telephone services to 30% of the state, essentially all of the state outside Las Vegas, where service is provided by CenturyLink. Nevada Bell spent nearly all of its history as a subsidiary of Pacific Bell, which is the reason Nevada Bell was not listed in Judge Harold Greene's Modification of Final Judgment, starting the breakup of AT&T.
Michigan Bell is the subsidiary of AT&T serving the state of Michigan. Following the Bell System divestiture on January 8, 1984, the company became a subsidiary of Ameritech, the Regional Bell operating company that served the midwestern United States. Ameritech was subsequently acquired by SBC Communications, which later changed its name to AT&T.
Illinois Bell Telephone Company, LLC is the Bell Operating Company serving Illinois. It is owned by AT&T through AT&T Teleholdings, formerly Ameritech.
Indiana Bell Telephone Company, Incorporated, is the Bell Operating Company serving Indiana. It is an indirect subsidiary of AT&T Inc., owned by AT&T Teleholdings.
Wisconsin Bell, Inc. is the name of the Bell Operating Company serving Wisconsin. It is owned by AT&T through AT&T Teleholdings, originally known as Ameritech.
YP Holdings, now a wholly owned subsidiary of DexYP, is the American parent company for YP LLC. Its products include printed telephone directories, yp.com and YP app. YP offers local search, display ads and direct marketing. On July 31, 2012, YP was included in PaidContent50's list of "the world's most successful digital media companies" based on 2011 digital ad revenue.
YP Texas Region Yellow Pages LLC is a division of YP Holdings that publishes telephone directories to Southwestern Bell customers for AT&T.
SBC Long Distance LLC is a long-distance telephone company owned by AT&T that does business as AT&T Long Distance. SBC Long Distance competes with other long-distance providers who provide service within some of the Bell Operating Company service boundaries of AT&T. 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.
Dex One Corporation was an American marketing company providing online, mobile and print search marketing via their DexKnows.com website, print yellow pages directories and pay-per-click ad networks in the U.S.
AT&T Inc. is an American multinational conglomerate holding company, Delaware-registered but it is headquartered at Whitacre Tower in Downtown Dallas, Texas. It is the world’s largest telecommunications company, and the second largest provider of mobile telephone services. As of 2020, AT&T was ranked 9th on the Fortune 500 rankings of the largest United States corporations, with revenues of $181 billion.
The Bell System was the system of companies, led by the Bell Telephone Company and later by AT&T, that dominated the telephone services industry in North America for 100 years from its creation in 1877 until its antitrust breakup in 1983. The system of companies was often colloquially called Ma Bell, as it held a vertical monopoly over telecommunication products and services in most areas of the United States and Canada. At the time of the breakup of the Bell System in the early 1980s, it had assets of $150 billion and employed over one million people.
AT&T Corporation, originally the American Telephone and Telegraph Company, is the subsidiary of AT&T Inc. that provides voice, video, data, and Internet telecommunications and professional services to businesses, consumers, and government agencies.
Southwestern Bell Telephone Company is a wholly owned subsidiary of AT&T. It does business as other d/b/a names in its operating region, which includes Arkansas, Kansas, Missouri, Oklahoma, Texas, and portions of Illinois.
The history of AT&T dates back to the invention of the telephone. The Bell Telephone Company was established in 1877 by Alexander Graham Bell, who obtained the first US patent for the telephone, and his father-in-law, Gardiner Greene Hubbard. Bell and Hubbard also established American Telephone and Telegraph Company in 1885, which acquired the Bell Telephone Company and became the primary telephone company in the United States. This company maintained an effective monopoly on local telephone service in the United States until anti-trust regulators agreed to allow AT&T to retain Western Electric and enter general trades computer manufacture and sales in return for its offer to split the Bell System by divesting itself of ownership of the Bell operating Companies in 1982.
The Southern New England Telephone Company, doing business as Frontier Communications of Connecticut, is a local exchange carrier owned by Frontier Communications.
