| Business | Phone |
| Odin Telesystems Inc 800 E Campbell Rd 334, Richardson 75081 | (972) 664-0100 |
| Telematics International Inc 800 E Campbell Rd, Richardson 75081 | (972) 680-5150 |
| Asap Voice Mail 1750 N Collins Blvd, Richardson 75080 | (972) 644-0008 |
| Datavon Inc 635 W Campbell Rd, Richardson 75080 | (972) 783-0284 |
| Global Data Svc 331 Melrose Dr, Richardson 75080 | (972) 235-5535 |
| Mobilestar Network Corp 1401 N Central Expy, Richardson 75080 | (972) 437-4900 |
| Acclaim Telcom 1300 E Arapaho Rd, Richardson 75081 | (972) 331-1700 |
| Aircom Intl Inc 800 E Campbell Rd, Richardson 75081 | (214) 360-7240 |
| Exi-Parsons Telecom Llc 705 N Glenville Dr, Richardson 75081 | (972) 638-2500 |
| Lasercomm 800 E Campbell Rd, Richardson 75081 | (972) 479-0434 |
| Rje Telecom 1411 E Campbell Rd, Richardson 75081 | (972) 437-6430 |
| Wynnco Networks 800 E Campbell Rd, Richardson 75081 | (214) 575-6380 |