| Business | Phone |
| Westport Communications 2833 S Winding Trail Dr, Columbia 65201 | (573) 443-4554 |
| World Communications Inc 1400 Forum Blvd, Columbia 65203 | (573) 445-8872 |
| World Satellite Communications 18 Business Loop 70 E # A, Columbia 65203 | (573) 876-5015 |
| Ixc Communications 3100 I 70 Dr Se, Columbia 65201 | (573) 474-1373 |
| Kemper & Assoc 3409 Southland Way, Columbia 65201 | (573) 256-5486 |
| Libla Communications 2403 Rangeline St, Columbia 65202 | (573) 499-0599 |