said by Anon :AT&T is actually now SBC which is actually SBC, AT&T, Pac Bell & Bell South. The monopoly has been back for some time but nobody cares about landline monopolies any longer.
You forgot about SNET and Ameritech :P
There are still a few gaps in the 'new' at&t's holdings, to make it what it was, pre-1984 (Divestiture). Qwest has those territories ...
Pacific Telisis came first, followed by SNET, then Ameritech, then Cellular One, then AT&T, then Bellsouth. I did leave out a few NON-Telco aquisitions... Nobody cares about web hosting, e-commerce or telco billing software