| Business | Phone |
| All Service Electric Schaumburg 60173 | (847) 238-5950 |
| International Piping Systems 444 E State Pkwy 123, Schaumburg 60173 | (847) 519-1900 |
| Jlt Electric 455 E State Pkwy 105, Schaumburg 60173 | (847) 519-1539 |
| J A Oster Electric Inc 226 Andrew Ln, Schaumburg 60193 | (847) 891-7802 |
| Kalish Electric Co 504 Lunt Ave A, Schaumburg 60193 | (847) 534-1267 |
| Mid-America Electric Co Inc Schaumburg 60193 | (847) 895-5544 |
| William A Pope Co 1024 Lunt Ave, Schaumburg 60193 | (847) 524-7990 |
| Holbrook-Carey Schaumburg 60194 | (847) 882-7861 |
| Trace Electric Inc 2209 Broadway Ln, Schaumburg 60194 | (847) 519-0225 |
| Tri-J Electric Inc 650 W Berkley Ln, Schaumburg 60194 | (847) 885-0806 |
| Illinois Transportation Dept 201 Center Ct, Schaumburg 60196 | (847) 705-4000 |
| Pinnacle Communications Po Box 681506, Schaumburg 60168 | (847) 843-7376 |
| Aec Motions Star Inc 1325 Wiley Rd 162, Schaumburg 60173 | (847) 884-9890 |
| Integrated Installations Inc 890 E Higgins Rd 150f, Schaumburg 60173 | (847) 330-1170 |
| Maxwell Electric Inc Schaumburg 60173 | (847) 995-0956 |
| Reptron Electronics Inc 1000 E State Pkwy, Schaumburg 60173 | (847) 882-1700 |
| Gts Electric Inc 735 Estes Ave, Schaumburg 60193 | (847) 534-0650 |
| Infinite Wireless 902 S Roselle Rd, Schaumburg 60193 | (847) 985-2337 |
| Jms Electric Inc 1006 Morse Ave, Schaumburg 60193 | (847) 352-3070 |
| Mc Williams Electric Co Inc 1401 Rodenburg Rd, Schaumburg 60193 | (847) 301-2600 |
| Pansal Electric Schaumburg 60193 | (847) 301-0207 |
| Premium Electric Svc Inc 502 Morse Ave, Schaumburg 60193 | (847) 524-1507 |
| Rice Mechanical 807 Estes Ave, Schaumburg 60193 | (847) 524-4180 |
| Sec Electric 545 W Wise Rd, Schaumburg 60193 | (847) 301-2940 |
| Zoltek Inc 1841 Mitchell Blvd, Schaumburg 60193 | (847) 584-0200 |
| Max Electric 1055 Stonehedge Dr, Schaumburg 60194 | (847) 885-8001 |
| Tmb Electrical Maintenance 2300 Denton Ct, Schaumburg 60194 | (847) 344-8173 |
| Advisors Estimators Schaumburg 60195 | (847) 310-0497 |
| R & T Electric Schaumburg 60195 | (847) 843-7252 |