US West

US West, Inc. was one of seven Regional Bell Operating Companies (RBOC's, also referred to as "Baby Bells"), created in 1983 under the Modification of Final Judgement (United States v. Western Electric Co., Inc. 552 Fed. Supp. 131), a case related to the antitrust breakup of AT&T. US West provided local telephone and intraLATA long distance services, data transmission services, cable television services, wireless communications services and related telecommunications products to defined areas in Arizona, Colorado, Idaho, Iowa, Minnesota, Montana, Nebraska, New Mexico, North Dakota, Oregon, South Dakota, Utah, Washington, and Wyoming. US West was a public company traded on the New York Stock Exchange under the ticker symbol "USW" with headquarters at 1801 California Street in Denver, Colorado.

Until 1990, US West was a holding company with three Bell Operating Companies: Mountain States Telephone & Telegraph (or Mountain Bell, based in Denver, Colorado); Northwestern Bell, based in Omaha, Nebraska; and Pacific Northwest Bell, based in Seattle, Washington. In 1988, the three companies began doing business under the US West Communications name. On January 1, 1991, Northwestern Bell and Pacific Northwest Bell were legally merged into Mountain Bell which was renamed US West Communications, Inc. US West was the first RBOC to consolidate its Bell Operating Companies (the other was BellSouth).