| Business | Phone |
| Avnet 21700 Copley Dr # 300, Diamond Bar 91765 | (909) 612-4000 |
| Fai Electronics 1370 Valley Vista Dr # 265, Diamond Bar 91765 | (909) 612-0667 |
| Amptronix Inc 701 Brea Canyon Rd, Diamond Bar 91765 | (909) 839-2858 |
| Dura Electronic Sales 23555 Golden Springs Dr # F, Diamond Bar 91765 | (909) 612-1044 |
| Future Electronics 1370 Valley Vista Dr, Diamond Bar 91765 | (909) 396-5350 |
| Halo Electronics Inc Diamond Bar 91765 | (909) 595-7675 |
| L S Electric 308 S Rock River Rd, Diamond Bar 91765 | (909) 396-0002 |
| Mic Technology Corp 556 N Diamond Bar Blvd # 301i, Diamond Bar 91765 | (909) 861-5055 |