According to our records, this business is located at 427 S La Salle St. in Chicago (in Cook County), Illinois 60605, the location GPS coordinates are: 41.8440759 (latitude), -87.6306356 (longitude). AT&T is categorized under Telephone Communications Broker (SIC code 4813). Known organization manager is J Sadler. You can contact the company by phone at (312) 663-8200.