The Gas Transportation Customer Service Center is available to assist you with billing inquiries, contract processing, nominations, credit activities and authorized use request. If you would like to email your questions you may email them to gtqa@nicor.com

The Telephone number is (630) 983-4040.

Option 1 will take you to a customer service representative,

Option 2 will take you to the nominations desk, and

Option 3 will give you critical day information or click here for Critical Day Information on the web.

For Gas Exchange problems please call (630) 983-8676 extension 2110.