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| Contractor | City | Phone | Fax | Services |
|---|---|---|---|---|
| American Energy Analysis, Inc. | Sycamore | (630) 277-1111 | (815) 899-3868 | Inside | Commercial |
| Aurora Sign Company | Aurora | (630) 898-5900 | (630) 898-6091 | Sign |
| AWF dba-Aurora Wiring & Fixture | Aurora | (630) 898-0749 | (630) 898-0874 | Inside | Commercial | Residential |
| Beery Heating & Cooling, Inc. | Oswego | (630) 585-6444 | (630) 585-6485 | Inside | Commercial |
| C & C Systems, LLC | Aurora | (630) 859-8312 | (630) 859-8312 | Inside | Commercial | Residential | Fire Alarm |
| Complete Electrical Service | Batavia | (630) 879-1098 | (630) 879-1128 | Inside | Commercial |
| Correct Electric, Inc. | Newark | (815) 496-3000 | (815) 496-2777 | Inside | Commercial | Voice | Data | Video |
| CTS of Illinois, Inc. | Montgomery | (630) 892-2355 | (630) 892-2055 | Voice | Data | Video | Fire Alarm |
| Fitzgerald's Electrical Cont. | Big Rock | (630) 556-3000 | (630) 556-3087 | Inside | Commercial |
| Frank Marshall Electric Midwest LLC | Aurora | (630) 892-2942 | (630) 892-2951 | Inside | Commercial |
| High Voltage Electric | St. Charles | (630) 584-3377 | (630) 584-1013 | Inside | Commercial | High Voltage |
| Holmgren Electric, Inc. | Elburn | (630) 220-5000 | (630) 365-9297 | Inside | Commercial |
| Huen Electric, Inc. | Aurora | (630) 851-3668 | (708) 343-5818 | Inside | Commercial | Residential | Voice | Data | Video |
| Inteck Systems, Inc. | Oswego | (630) 551-0884 | (630) 551-1305 | Voice | Data | Video | Fire Alarm |
| M & S Security Systems, Inc. | Oswego | (815) 990-4001 | (708) 639-4477 | Voice | Data | Video |
| Media Tech LLC | St. Charles | (630) 444-0011 | (630) 444-1535 | Voice | Data | Video |
| Mendel Electrical | St. Charles | (630) 377-3608 | (630) 377-2833 | Inside | Commercial | Residential |
| Naperville Electrical Contractors, Inc. | Oswego | (630) 554-0077 | (630) 554-0137 | Voice | Data | Video | Inside | Commercial | Residential |
| National Technologies NTI | West Chicago | (630) 768-7093 | (630) 851-7761 | Voice | Data | Video |
| Platinum Communications LLC | Geneva | (630) 777-7501 | (630) 232-7573 | Voice | Data | Video |
| Platt Electric Company | Aurora | (630) 851-5799 | (630) 851-5723 | Inside | Commercial |
| Rehm Electric Shop | St. Charles | (630) 584-0009 | (630) 584-0641 | Inside | Commercial |
| USA Security Systems | St. Charles | (888) 311-4440 | (888) 311-4440 | Voice | Data | Video | Fire Alarm |
| Valley Electrical Contractors Inc | Oswego | (630) 554-6200 | (630) 554-8001 | Inside | Commercial |