GTE Corporation, formerly General Telephone & Electronics Corporation (1955–1982), was the largest independent telephone company in the United States during the days of the Bell System. The company operated from 1926, with roots tracing further back than that, until 2000, when it was acquired by Bell Atlantic; the combined company took the name Verizon.
A Regional Bell Operating Company (RBOC) was a corporate entity created as result of the antitrust lawsuit by the U.S. Department of Justice against the American Telephone and Telegraph Company (AT&T) in 1974 and settled in the Modification of Final Judgment on January 8, 1982.
BellSouth, LLC was an American telecommunications holding company based in Atlanta, Georgia. BellSouth was one of the seven original Regional Bell Operating Companies after the U.S. Department of Justice forced the American Telephone & Telegraph Company to divest itself of its regional telephone companies on January 1, 1984.
Cincinnati Bell, Inc., doing business as Altafiber, 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 Altafiber Home Phone and Hawaiian Telcom, which are the incumbent local exchange carriers for the Greater Cincinnati metropolitan area and Hawaii. Other subsidiaries provide enterprise information technology services and long distance calling.
Cellular One is the trademarked brand name that licenses services used by several cellular service providers in the United States. The brand was sold to Trilogy Partners by AT&T in 2008 shortly after AT&T had completed its acquisition of Dobson Communications. Cellular One was originally the trade name of one of the first mobile telephone service providers.
The monopoly position of the Bell System in the U.S. was ended on January 8, 1982, by a consent decree providing that AT&T Corporation would, as had been initially proposed by AT&T, relinquish control of the Bell Operating Companies, which had provided local telephone service in the United States. 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.
Verizon New York, Inc., formerly The New York Telephone Company (NYTel), was organized in 1896, taking over the New York City operations of the American Bell Telephone Company.
South Central Bell Telephone Company, headquartered in Birmingham, Alabama, is the name of the Bell System's operations in Alabama, Kentucky, Louisiana, Mississippi and Tennessee. South Central Bell was created in July 1968 when the Bell telephone operations in those states were split off from Southern Bell. South Central Bell was headquartered in the AT&T City Center building in Birmingham. As of early 1992 the South Central Bell name is no longer used but the service network itself still exists and performs business and operates as the "new" AT&T.
Verizon New England, Inc. was a Bell Operating Company that once covered most of New England but most recently only served most of Massachusetts and all of Rhode Island. It was formerly New England Telephone and Telegraph Company, more commonly known as New England Telephone, which for seven decades served most of the New England area of the United States as a part of the original AT&T. New England Telephone's original coverage area included Maine, New Hampshire, and Vermont as well as Massachusetts and Rhode Island, Verizon has sold off service in the northern three states, which as of 2020 were served by Consolidated Communications.
The Chesapeake and Potomac Telephone Company, usually known as C&P Telephone, is a former d/b/a name for four Bell Operating Companies providing service to Washington, D.C., Maryland, West Virginia, and Virginia.
Verizon South, Inc. is a Verizon operating company providing local telephone services to portions of Virginia and North Carolina in the United States.
BellSouth Telecommunications, LLC was an operating company of AT&T that served the southeastern United States. It consisted of the operations of Southern Bell and South Central Bell.
Qwest Corporation is a Regional Bell Operating Company owned by Lumen Technologies. It was formerly named U S WEST Communications, Inc. from 1991 to 2000. It was also named Mountain States Telephone and Telegraph Company–later Mountain Bell from 1911 to 1991. In the early 2010s the Mountain Bell name was resurrected by CenturyLink, Inc. In other words, Mountain Bell Telephone Company still exists but the MB corporate name is no longer used from 1991 and afterwards. Mountain Bell now does business as the Lumen Technologies. It includes the former operations of Malheur Bell, Northwestern Bell and Pacific Northwest Bell as well. The NWBT and PNB companies still exist but no longer use the names for marketing or as corporate identities.
The Bell System was a system of telecommunication companies, led by the Bell Telephone Company and later by the American Telephone and Telegraph Company (AT&T), that dominated the telephone services industry in North America for over 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, commonly referred to as AT&T, an abbreviation for its former name, the American Telephone and Telegraph Company, was an American telecommunications company that provided voice, video, data, and Internet telecommunications and professional services to businesses, consumers, and government agencies.
Verizon Maryland LLC is Bell Operating Company owned by Verizon Communications serving the state of Maryland. Its headquarters are in Baltimore.
Frontier West Virginia, Inc. is one of the original Bell Operating Companies and provides local telephone service in the U.S. state of West Virginia.
