| Business | Phone |
| Witt Disintegrating Svc 729 W Fullerton Ave F, Addison 60101 | (630) 628-9570 |
| Elcast Lighting 815 S Kay Ave, Addison 60101 | (630) 543-5390 |
| Grinnell Fire Protection 91 N Mitchell Ct, Addison 60101 | (630) 834-2300 |
| Guardian Fire Protection Systs 1410 Jeffrey Dr, Addison 60101 | (630) 424-8700 |
| Hausermann Die & Machine Co 300 W Laura Dr, Addison 60101 | (630) 543-6688 |
| Instrumentation & Control Syst 520 W Interstate Rd, Addison 60101 | (630) 543-6200 |
| Kbm Ind Inc 818 S Westwood Ave D, Addison 60101 | (630) 543-6229 |
| Keystone Wire & Cable Co Inc 1455 Bernard Dr, Addison 60101 | (630) 705-0042 |
| Liquid Tight Connector 900 S Kay Ave, Addison 60101 | (630) 628-3176 |
| Mega Circuit Inc 311 W Gerri Ln, Addison 60101 | (630) 458-2786 |
| Mega Circuits 1040 S Westgate St A, Addison 60101 | (630) 629-1800 |
| Micro Circuits Inc 222 W Fay Ave, Addison 60101 | (630) 628-5760 |
| Nu Venture Systems Group 829 W Heritage Dr, Addison 60101 | (630) 529-9395 |
| Ono Sokki Technology 2171 W Executive Dr 400, Addison 60101 | (630) 627-9700 |
| Palmer Johnson Distributors 1201 W National Ave, Addison 60101 | (630) 628-6980 |
| Quality Circuits Inc 109 W Fullerton Ave, Addison 60101 | (630) 543-5200 |
| R A Mechanical 1001 W Republic Dr, Addison 60101 | (630) 628-0288 |
| Rpm Midwest Sales 230 Fairbank St, Addison 60101 | (630) 458-9511 |
| Safe & Smart Security Inc 1008 N Rohlwing Rd, Addison 60101 | (630) 916-1100 |
| Simplex Grinnell 91 N Mitchell Ct, Addison 60101 | (630) 948-1100 |
| Storage Battery Systems Inc 719 W Fullerton Ave, Addison 60101 | (630) 543-4885 |
| Sunrise Electric Supply 130 S Addison Rd, Addison 60101 | (630) 543-1111 |
| Traffic Control Corp 780 W Belden Ave D, Addison 60101 | (630) 543-1300 |
| Villa Park Electrical Supply 420 W North Ave, Addison 60101 | (630) 629-3990 |