ComEd
Website: www.exeloncorp.com/ourcompanies/comed/comedres/
Phone: 1-800-EDISON-1 (1-800-334-7661)

Nicor
Website: www.nicor.com
Phone: 1-888-Nicor4U (1 888-642-6748)

ATT/SBC
Website: www.sbc.com

Comcast
Website: www.comcast.com
Phone: 1-866-594-1234