List of agencies Illinois
- ComEd office in Chicago (60654)
- Mt. Carmel Public Utility office in Mt Carmel - Market St (62863)
- Mt. Carmel Public Utility office in Mt Carmel - Mulberry St (62863)
- Western Illinois Electric Coop office in Carthage (62321)
- City of Altamont Utility office in Altamont (62411)
- City of Batavia - Department of Public Works, Electric Utility Division office in Batavia (60510)
- Breese Municipal Electric Utility office in Breese (62230)
- Cairo Public Utility Company office in Cairo (62914)
- Carmi Water Light & Power office in Carmi (62821)
- Village of Chatham Utility office in Chatham (62629)
- City of Fairfield Fairfield Electric & Gas Department office in Fairfield (62837)
- City of Geneseo Electric Utility Department office in Geneseo (61254)
- City of Marshall Public Works Department office in Marshall (62441)
- Metropolis City Utilities office in Metropolis (62960)
- Naperville Electrical Department office in Naperville (60540)
- Red Bud Utility Department office in Red Bud (62278)
- Waterloo Electric Department office in Waterloo (62298)
- Winnetka Water & Electric office in Winnetka (60093)
- Clinton County Electric Cooperative office in Breese (62230)
- City Water, Light & Power office in Springfield (62757)
- City of Casey Utilities office in Casey (62420)
- Adams Electric Cooperative office in Camp Point (62320)
- Bushnell Municipal Utilities office in Bushnell (61422)
- Rock Falls Electric Utilities office in Rock Falls (61071)
- EnerStar Electric Cooperative office in Paris (61944)
- Jo-Carroll Energy office in Elizabeth (61028)
- Jo-Carroll Energy office in Savanna (61074)
- Jo-Carroll Energy office in Geneseo (61254)
- Tri-County Electric Cooperative office in Mt Vernon (62864)
- Tri-County Electric Cooperative office in Salem (62881)
- Wayne-White Counties Electric Cooperative office in Fairfield (62837)
- Coles-Moultrie Electric Cooperative office in Mattoon (61938)
- Eastern Illini Electric Cooperative office in Paxton (60957)
- Egyptian Electric Cooperative Association office in Murphysboro (62966)
- Illinois Rural Electric Cooperative office in Winchester (62694)
- MidAmerican Energy office in Moline (61265)
- MJM Electric Cooperative office in Carlinville (62626)
- Monroe County Electric Co-operative office in Waterloo (62298)
- Mount Carmel Public Utility Co. office in Mount Carmel (62863)
- Norris Electric Cooperative office in Newton (62448)
- Rock Energy Cooperative office in South Beloit (61080)
- Rural Electric Convenience Cooperative office in Auburn (62615)
- Shelby Electric Cooperative office in Shelbyville (62565)
- Southeastern Illinois Electric Cooperative office in Eldorado (62930)
- Southern Illinois Electric Cooperative office in Dongola (62926)
- Spoon River Electric Cooperative office in Canton (61520)
- Western Illinois Electric Cooperative office in Carthage (62321)
- Corn Belt Energy office in Bloomington (61705)
- McDonough Power Cooperative office in Macomb (61455)
- Menard Electric Cooperative office in Petersburg (62675)
- Ameren Illinois office in Peoria (61602)
- Southwestern Electric Cooperative office in Greenville (62246)
- Southwestern Electric Cooperative office in Jacob (62281)
- Ameren Illinois office in Decatur (62523)
- Ameren Illinois office in East St Louis (62207)
- Ameren Illinois office in Bloomington (61704)
- Ameren Illinois office in Illiopolis (62539)
- Ameren Illinois office in Le Roy (61752)
- Ameren Illinois office in Tuscola (61953)
- Ameren Illinois office in Collison (61831)
- Ameren Illinois office in Normal (61761)
- Ameren Illinois office in Alexis (61412)
- Ameren Illinois office in Kewanee (61443)
- Ameren Illinois office in Collinsville (62234)
- Ameren Illinois office in Johnston City (62951)
- Ameren Illinois office in Pinckneyville (62274)
- Ameren Illinois office in Sparta (62286)
- Ameren Illinois office in Chester (62233)
- Ameren Illinois office in Mascoutah (62258)
- Ameren Illinois office in De Witt (61735)
- Ameren Illinois office in Spring Valley (61362)
- Ameren Illinois office in Stanford (61774)
- Ameren Illinois office in Glasford (61533)
- Commonweatlh Edison Company office in Joliet (60433)
- Commonweatlh Edison Company office in Crystal Lake (60012)
- Commonweatlh Edison Company office in Pana (62557)
- Commonweatlh Edison Company office in Streator (61364)
- Commonweatlh Edison Company office in Chicago (60623)
- Commonweatlh Edison Company office in Chicago (60652)
- Commonweatlh Edison Company office in Oakbrook Terrace (60181)
- Commonweatlh Edison Company office in Chicago (60618)
- Commonweatlh Edison Company office in Oak Brook (60523)