This is a public forum; anybody and everybody has access to posted information. I put in a Mod request to remove the address.
AT&T and CenturyLink are both ILECs (Incumbent Local Exchange Carrier), and incumbents don't usually share plants. AFAIK, since SBC bought AT&T, they ("T") no longer offer CLEC service, which is what "Worldnet" was, in part.
A company called, DSL Extreme
does offer CLEC service in many states. They even have a forum here:
Or try your local cable company.--
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum