| Business | Phone |
| A D Electric 27639 Powell Dr, Highland 92346 | (909) 862-0728 |
| Courtney's Electric Inc 27202 3rd St, Highland 92346 | (909) 862-5335 |
| Highland Electric 3631 Lynwood Dr, Highland 92346 | (909) 864-6110 |
| Jms Electric 6965 Dover Ct, Highland 92346 | (909) 882-6641 |
| Noble Electric & Comm 29561 Chandler Rd, Highland 92346 | (909) 862-5575 |
| Gci Electric Highland 92346 | (909) 864-1188 |
| J M S Electric Inc 27239 5th St, Highland 92346 | (909) 862-2375 |
| Mannytsons Conditioning Elctrc 3445 Oleander Dr, Highland 92346 | (909) 758-6233 |
| R C Electric 27210 3rd St, Highland 92346 | (909) 425-2212 |
| Universal Techs 7658 Lankershim Ave, Highland 92346 | (909) 863-9677 |