| Business | Phone |
| Calibration Consultants 4204 Sorrento Valley Blvd, San Diego 92121 | (858) 546-1999 |
| Accutek Calibration Lab 9212 Mira Este Ct # 100, San Diego 92126 | (858) 536-3344 |
| Anmar Metrology Inc 7726 Arjons Dr # B, San Diego 92126 | (858) 621-2630 |
| Simco Electronics 7515 Convoy Ct, San Diego 92111 | (858) 292-1090 |
| Micro Precision Calibration 9080 Activity Rd # C, San Diego 92126 | (858) 547-0217 |
| M & D Cal Lab Systems San Diego 92126 | (858) 530-2790 |