Note: For certified and registered electric suppliers, click Electric Choice/Plug In Illinois®.
- American Lake Water Company
- BP Oil Pipeline Company
- BP Pipelines (North America) Inc.
- Buckeye Pipe Line Company, L.P.
- CenterPoint Energy - Illinois Gas Transmission Company
- Chicap Pipe Line Company
- ConocoPhillips Pipe Line Company
- Enbridge Energy Company, Inc.
- Enbridge Energy Partners, L.P.
- Enbridge Energy, Limited Partnership
- Enbridge Pipelines (FSP), L.L.C.
- Enbridge Pipelines (Illinois) L.L.C.
- Enterprise TE Products Pipeline Company LLC
- Explorer Pipeline Company
- Kinder Morgan Cochin LLC
- Magellan Pipeline Company L.P.
- Marathon Pipe Line LLC
- Mid-America Pipeline Company, LLC
- Mobil Pipe Line Company
- Norco Pipe Line Company, LLC
- Phillips Pipe Line Company
- Plains Pipeline, L.P.
- Shell Pipeline Company LP
- TransCanada Keystone Pipeline, LP
- Unocal Pipeline
- West Shore Pipe Line Company
- Wolverine Pipe Line Company
- Wood River Pipe Lines, LLC