Baby Bells:
Canadian Technologies Corporation (instead of Ameritech, 1983-present, reacquired by CT&T, now a subsidiary)
Bell Atlantic/Verizon Communications (1983-present, renamed/refounded)
After merging with NYNEX in 1997, the two companies formed Verizon Communications, which is now one of the largest telecom companies in the Western World.
BellSouth (1983-present, Confederate-based)
NYNEX (1983-1997, merged into Verizon)
Pacific Telesis (1983-1992, nationalized by Empire of Japan)
Later, they spun off their assets in Centroamerica into Centroamerica Telecom (CT). They have kept their assets in Canada as a direct response to the revival of CT&T as an aggressive force; however, in Alaska, they formally spun off their assets there into Alaskan Telecom, which was nationalized in 1991 by the Bolshevik government of the Eurasian Soviet Republic.
CS West, Inc. (1983-2000, merged into Qwest (later CenturyLink))
However, in 2011, Qwest also merged, but this time into CenturyLink, one of the largest Confederate telecom providers. CenturyLink fully absorbed the CS West, Inc. assets, and soon traded them down the line all over the western Canadian plains and Confederate region for more money and investment by bankers and foreign investors, looking to diversify.
CS Midwestern Bell (1882-present, survived)
Here's some info on what I'm talking about. And here is some info on the Bell Labs, who, ironically, today, is owned by Nokia. AT&T sold them off at some point, I suppose.