Regional Bell Operating Company

In 1997, Bellcore was acquired by Science Applications International Corporation where it became a wholly owned subsidiary and was renamed Telcordia.

[2] 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 2005, following a protracted bidding war with rival RBOC Qwest, Verizon announced that it would acquire long-distance company MCI.

The company has largely maintained its lead over the years through further acquisitions (notably, of Alltel Wireless and TracFone) and through organic growth.

In December 2019, Cincinnati Bell announced that Brookfield Infrastructure Partners would acquire the company for $2.6 billion.

[8] On September 7, 2021, Macquarie Infrastructure and Real Assets completed its purchase of Cincinnati Bell, Inc. and later rebranded the company name to AltaFiber.

FairPoint Communications, an independent provider based in North Carolina, acquired Northern New England Telephone Operations.

NNETO is an operating company split from the original New England Telephone to serve access lines in Maine and New Hampshire.

[10] On April 1, 2016, Frontier Communications (FTR) completed the data conversions from the Verizon systems for the remaining three largest former GTE properties: California, Florida and Texas.

On May 1, 2020, Frontier Communications (FTR) completed the sale of its Northwest Regional companies of Idaho, Montana, Oregon and Washington to Ziply Fiber in an effort to avoid Chapter 11 bankruptcy.

This move did not solve Frontier Communications financial problems resulting in a Chapter 11 Bankruptcy filing on April 14, 2020.