Illinois Bell Telephone Company, LLC is the Bell Operating Company serving Illinois. It is owned by AT&T through AT&T Teleholdings, formerly Ameritech. Their headquarters are at 225 West Randolph St., Chicago, IL. From Wikipedia
Prosecutors allege AT&T Illinois funneled payments to a former state representative to secure legislative support, implicating ex-Speaker Michael Madigan in a broader racketeering case.
