Private company

Regional Bell Operating Company

Logo: John M Wolfson, CC0, via Wikimedia Commons3

U.S. regional telephone company created by 1984 break of AT&T

A Regional Bell Operating Company (RBOC) was a corporate entity created as result of the antitrust lawsuit by the United States Department of Justice against the Western Electric Company and American Telephone and Telegraph Company (AT&T) in 1949 and a suit in 1974 against AT&T (United States v. The suits were settled in the Modification of Final Judgment in August 1982. AT&T agreed to divest its local exchange service operating companies, effective January 1, 1984.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 20, 2026.

Overview

Jan 1, 1984Founded1

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A Regional Bell Operating Company (RBOC) was a corporate entity created as result of the antitrust lawsuit by the United States Department of Justice against the Western Electric Company and American Telephone and Telegraph Company (AT&T) in 1949 and a suit in 1974 against AT&T (United States v. AT&T). The suits were settled in the Modification of Final Judgment in August 1982.2

Acquisitions

  1. Succeeded AT&T Corporation1
  2. Succeeded Bell System1

Many of these companies have since merged; by the end of 2000, there were only three of the original Baby Bells left in the United States. After the 1984 breakup, part of AT&T Corp.'s Bell Labs was split off into Bellcore, which would serve as an R&D and standards body for the seven Baby Bells. In 1997, Bellcore was acquired by Science Applications International Corporation where it became a wholly owned subsidiary and was renamed Telcordia.

AT&T Inc.

Southwestern Bell Corporation, which changed its name to SBC Communications in 1995, acquired Pacific Telesis in 1997, SNET in 1998, and Ameritech in 1999. In February 2005, SBC announced its plans to acquire former parent company AT&T Corp. for over $16 billion. SBC took on the AT&T name upon merger closure on November 18, 2005. SBC began trading as AT&T Inc. on December 1, 2005, but began re-branding as early as November 21 of the same year. In 2006 AT&T Inc. purchased BellSouth.

Verizon Communications

In 1997, NYNEX was acquired by Bell Atlantic (taking the Bell Atlantic name), which later, in 2000, acquired GTE, the largest independent telephone company. Bell Atlantic later changed its name to Verizon that same year.

In 2005, following a protracted bidding war with rival RBOC Qwest, Verizon announced that it would acquire long-distance company MCI. The Verizon and MCI merger closed on January 6, 2006.

Read the full text

Bell Atlantic Mobile became the largest wireless carrier in the United States through its merger with NYNEX Mobile, its acquisition of Frontier Cellular, its subsequent merger with GTE Wireless, and its joint venture with Vodafone (consolidating its AirTouch business into Bell Atlantic Mobile). The latter two transactions effectively formed Verizon Wireless (which remained a partnership between Verizon Communications and Vodafone until 2013). The company has largely maintained its lead over the years through further acquisitions (notably, of Alltel Wireless and TracFone) and through organic growth. surpassing T-Mobile and even AT&T in wireless. Over time much of its wireline area was spun off including northern New England to Consolidated Communications and other areas with landline businesses to both Frontier Communications and FairPoint Communications. In 2024, Verizon announced it will acquire Frontier Communications in a $20 billion deal. The acquisition was approved by the FCC in May 2025.

Lumen Technologies, Inc.

Lumen Technologies, Inc. was originally Century Telephone (CenturyTel), and took the CenturyLink name in 2009 when it acquired Embarq, the former local operations of Sprint Nextel, which also included the former operations of Centel. The company, as CenturyTel, had acquired some Wisconsin Bell lines from Ameritech in 1998.

Qwest, a Denver-based fiber optics long-distance company, had taken over US West in 2000. CenturyLink announced in April 2010 its intent to buy Qwest for US$10.6 billion. The transaction was completed in April 2011. In August 2011, the Qwest branding was retired and replaced by that of CenturyLink. CenturyLink rebranded to Lumen Technologies in September 2020.

In May 2025, AT&T announced the purchase of Lumen Technologies' mass-market connectivity business. Following the transaction, Lumen will concentrate on serving business, enterprise and cloud customers. Lumen will also retain its legacy copper-based telephone network which has only a few remaining customers and is slated for retirement in the upcoming years.

From Wikipedia’s article on Regional Bell Operating Company, shared under CC BY-SA 4.0.4

Timeline

  1. Jan 1, 1984Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

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