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Exclamation Icon Leaks, Odor or Emergencies 888.Nicor4U (642.6748)
811 Icon Call Before You Dig
Dial 811
My Account Sign In
My Account Sign In

Contact Information

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@southernco.com

The telephone number is 630.983.4040.

  • Option 1 for a customer service representative
  • Option 2 for the nominations desk
  • Option 3 for Critical Day and OFO information

The fax number 630.983.6070.

For Gas Exchange problems please call 630.388.2589.