| Business | Phone |
| Marshall Wireless 2432 Highway K, O Fallon 63368 | (636) 379-5880 |
| Custom Cellular 4257 Keaton Crossing Blvd, O Fallon 63368 | (636) 300-0331 |
| Cingular Wireless 1315 Highway K, O Fallon 63366 | (636) 978-2544 |
| Cingular Wireless 2210 Highway K, O Fallon 63368 | (636) 978-9660 |
| Cingular Wireless 719 Highway K, O Fallon 63366 | (636) 980-8014 |