AT&T refers to several related companies providing telecommunications services:
AT&T may also refer to:
A bell is a percussion instrument, usually cup-shaped.
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 the 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.
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.
AT&T Wireless Services, formerly part of AT&T Corp., was a wireless telephone carrier founded in 1987 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, 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 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.
Houston Cellular was a Houston-based cell phone company which provided AMPS and D-AMPS (TDMA) service in the Greater Houston area. It was formed in 1983 and was operated as a partnership between LIN Broadcasting Corp., Mobile Communication Corp. of America and BellSouth Co. Its headquarters were located in Houston, Texas.
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.
Alascom, Inc., d/b/a AT&T Alaska, is an Alaskan telecommunications company; specifically, an interexchange carrier (IXC). AT&T Alascom is currently a wholly owned subsidiary of AT&T Inc. AT&T Alascom, previously known as Alascom and many other names, was the first long-distance telephone company in Alaska. AT&T Alascom has extensive telecommunications infrastructure in Alaska, including three satellites, undersea and terrestrial cables containing optical fiber, and numerous earth stations.
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.
AT&T Laboratories, Inc. was the research & development division of AT&T Corporation. It was founded in 1925 as Bell Telephone Laboratories, Inc., following the merger of the research & development divisions of American Telephone & Telegraph and Western Electric.
AT&T Labs is the research & development division of AT&T. It employs some 1800 people in various locations, including: Bedminster NJ; Middletown, NJ; Manhattan, NY; Warrenville, IL; Austin, TX; Dallas, TX; Atlanta, GA; San Francisco, CA; San Ramon, CA; and Redmond, WA. AT&T Labs – Research, the 450-person research division of AT&T Labs, is based in the Bedminster, Middletown, San Francisco, and Manhattan locations.
BellSouth Telecommunications, LLC is an operating company of AT&T that serves the southeastern United States. It consists of the former operations of Southern Bell and South Central Bell.
Alcatel–Lucent S.A. was a French–American global telecommunications equipment company, headquartered in Boulogne-Billancourt, France. It was formed in 2006 by the merger of France-based Alcatel and U.S.-based Lucent, the latter being a successor of AT&T's Western Electric and Bell Labs.
AT&T Inc. is an American multinational telecommunications holding company that is Delaware-registered but headquartered at Whitacre Tower in Downtown Dallas, Texas. It is the world's largest telecommunications company and the largest provider of mobile telephone services in the U.S. 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 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 one hundred 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.
Numerex Corp. – a wholly owned subsidiary of Sierra Wireless NASDAQ:(SWIR) – is a provider of managed machine-to-machine (M2M) enterprise solutions enabling the Internet of Things (IoT).