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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; with the combined companies formed under the currently operating Verizon banner.
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.
Rochester Telephone Corporation was a company that provided local telephone service to Rochester, New York. The company was founded in 1920 as a merger of Rochester Telephonic Exchange and Rochester Telephone Company. In 1995 the company became Frontier Corporation, trading on the NYSE under the FRO symbol. Ownership passed to Global Crossing in 1999, and then, in 2001, to Citizens Utilities Corporation, which later changed its name to Frontier Communications.
The monopoly position of the Bell System in the U.S. was ended on January 8, 1982. AT&T Corporation proposed by in a consent decree to 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.
GTE Midwest, Inc. was a GTE operating company formed in 1993 upon the split off of some GTE local telephone operations from GTE North. GTE Midwest served Missouri, Iowa, Nebraska, and Minnesota, and included the former operations of Contel in Iowa and Missouri.
Northwest Fiber, LLC, doing business as Ziply Fiber, is an American telecommunications company based in Kirkland, Washington. Owned by WaveDivision Capital, the company operates fiber-optic broadband services in the Pacific Northwest, serving 1.3 million residential and business customers in Washington, Oregon, Idaho and Montana. It has major offices in Everett, Washington, Beaverton, Oregon, and Hayden, Idaho.
Frontier Southwest Incorporated is a Frontier Communications operating company in Texas. At its peak, Frontier Southwest served Arkansas, Oklahoma, Texas, and New Mexico.
Verizon South, Inc. is a Verizon operating company providing local telephone services to portions of Virginia and North Carolina in the United States.
Qwest Corporation is a Regional Bell Operating Company owned by Lumen Technologies. It was originally named Mountain States Telephone and Telegraph Company, later becoming known as Mountain Bell, then US West Communications, Inc. from 1991 to 2000. It includes the former operations of Malheur Bell, Northwestern Bell and Pacific Northwest Bell as well.
Frontier Communications Parent, Inc. is an American telecommunications company. Known as Citizens Utilities Company until 2000, Citizens Communications Company until 2008, and Frontier Communications Corporation until 2020, as a communications provider with a fiber-optic network and cloud-based services, Frontier offers broadband internet, digital television, and computer technical support to residential and business customers in 25 states. In some areas it also offers home phone services.
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.
Citizens Telecommunications Company of West Virginia is the local exchange carrier of telephone service in some regions in West Virginia.
Navajo Communications Company, Inc. is the operating company of Frontier Communications that provides telephone services in Arizona to the Navajo people.
Citizens Telecommunications Company of the White Mountains is a Frontier operating company providing local telephone services to portions of Arizona.
Citizens Telecommunications Company of California Inc. is a telephone operating company of Frontier Communications based in Elk Grove, California. It was established in 1993 to acquire 5,000 access lines from GTE. In 1996, it acquired 20,000 access lines from Alltel in the Tuolumne and Golden State areas. In 2007, Citizens acquired Global Valley Networks, serving Capay Valley, Livingston, and Patterson. In 2013, Frontier Communications West Coast, a former GTE property serving Crescent City, was merged into Citizens.
Embarq Missouri, Inc. was a telephone operating company providing local telephone services in Kansas and Missouri owned by BrightSpeed.
Spectra Communications Group, LLC is a U.S. telephone operating company owned by CenturyLink that provides local telephone service in Missouri.
