They arent releasing phone numbers; I work in telecommunications, and have been dealing with these rumors for over a year now. It is private information; you cannot search for it, in say the white pages, because of that. They will NOT be released next month. If they are, I will eat my hat. And, I REALLY dont want to do that, as I like my hat!!!
If ATT is the only one that did it, they did so either voluntarily, or accidentally. They certainly werent ORDERED to...my guess is someone either hacked them in TX, or a disgruntled employee released them. IF it were even true. And, depending on WHEN it happened, there may have been confusion as to what #'s were cells, and which ones were landlines.