1. AT&T Administrative Offices
1400 W Thorndale Ave, Itasca, IL 60143
Coordinate: 41.98234,-88.03581
Phone: (210) 348-3480
2. PaeTec Communications
947 W Hawthorn Dr, Itasca, IL 60143
Coordinate: 41.96688,-88.02875
Phone: (630) 773-3009
3. Level One Communications Inc
1 Pierce Pl, Itasca, IL 60143
Coordinate: 41.9887,-88.01662
Phone: (630) 250-6044
4. Marconi
333 W Pierce Rd Ste 370, Itasca, IL 60143
Coordinate: 41.98845,-88.01185
Phone: (630) 285-5302