| Business | Phone |
| Interchange System 1000 Heritage Center Cir, Round Rock 78664 | (512) 940-2104 |
| Honest Tech Co Ltd 1122 Sundrop Pl, Round Rock 78664 | (512) 248-2215 |
| Tek Alchemy Inc Po Box 1016, Round Rock 78680 | (512) 733-8811 |
| Fusioneering Inc 948 Blue Spring Cir, Round Rock 78681 | (512) 244-0026 |
| Internet Transactions Corp 16535 Avaranche Way, Round Rock 78681 | (512) 248-0021 |