| Business | Phone |
| Cen-Tex Surveying Co 503 S Lake Creek Dr, Round Rock 78681 | (512) 473-8800 |
| Big Sky Surveying 1402 Baffin Cv, Round Rock 78664 | (512) 248-1484 |
| Cen-Tex Surveying Round Rock 78664 | (512) 248-1125 |
| Coalter & Assoc 905 N I H 35 108, Round Rock 78664 | (512) 255-8211 |
| Crichton & Assoc 107 N Lampasas St, Round Rock 78664 | (512) 244-3395 |
| Big Sky Surveying 1201 E Old Settlers Blvd #7212, Round Rock 78664 | (512) 248-1484 |