| Business | Phone |
| Alpha Controls & Svc Llc 4104 Charles St, Rockford 61108 | (815) 227-4000 |
| Applied Industrial Tech Inc 3384 N Publishers Dr D, Rockford 61109 | (815) 874-8767 |
| Testing Machines Inc Rockford 61108 | (815) 227-1304 |
| Square D 1437 S Bell School Rd, Rockford 61108 | (815) 397-1992 |
| Cass Security Rockford 61108 | (815) 399-7764 |
| Security Partners Rockford 61104 | (815) 621-0667 |
| Pro Com Systems 3555 Electric Ave, Rockford 61109 | (815) 229-1870 |
| A & R Security Rockford 61101 | (815) 963-4480 |
| Indeck Rockford Energy Ctr 136 Harrison Ave, Rockford 61104 | (815) 968-4421 |
| Fox Controls Inc Rockford 61109 | (815) 874-0661 |
| Imperial Motor & Armature Co 2700 Potter St, Rockford 61109 | (815) 398-2313 |
| Pacific Scientific Motor 4301 Kishwaukee St, Rockford 61109 | (815) 226-3092 |