| Business | Phone |
| Cross Engineering Consultants 116 N Tennessee St 202, Mckinney 75069 | (972) 562-4409 |
| Engineer Resources 201 E Virginia St, Mckinney 75069 | (972) 547-0380 |
| Harper Systems Inc 4015 Summit Ct, Mckinney 75069 | (972) 359-8884 |
| Sizemore Telecom Svc 119 W Virginia St, Mckinney 75069 | (972) 562-4007 |
| Standard Telecom Svc 808 S College St, Mckinney 75069 | (972) 562-9400 |