| Business | Phone |
| Bree Engineering 1269 Linda Vista Dr, San Marcos 92078 | (760) 510-4950 |
| Cabletronics San Marcos 92069 | (760) 744-5720 |
| Falmat Inc 1873 Diamond St, San Marcos 92078 | (760) 471-5400 |
| Cabletronics 1132 San Marino Dr, San Marcos 92078 | (760) 744-5720 |
| Cableworks 419 S Las Posas Rd, San Marcos 92078 | (760) 471-7794 |
| Rework Innovations Inc 1165 Linda Vista Dr # 107, San Marcos 92078 | (760) 471-8458 |
| Fluid Components Inc 1755 La Costa Meadows Dr, San Marcos 92078 | (760) 744-6950 |
| General Electronic Devices 320 S Pacific St, San Marcos 92078 | (760) 591-4170 |