| Business | Phone |
| Information Tools 1063 14th Pl B, Des Moines 50314 | (515) 282-4626 |
| Rankin Communication Systems Des Moines 50310 | (515) 270-8019 |
| Dorrian Communications 928 Morton Ave, Des Moines 50316 | (515) 243-5735 |
| Tct Co 382 Highway G50, Des Moines 50315 | (515) 285-6116 |
| Telesupport Inc 660 Ne 54th Ave, Des Moines 50313 | (515) 265-8353 |
| Valcon Technologies Des Moines 50309 | (515) 243-7536 |
| Van Meter Telecommunications 1751 Guthrie Ave, Des Moines 50316 | (515) 262-1772 |