| Business | Phone |
| Applied Network Svc 1030 W Crumley St, West Covina 91790 | (626) 960-0753 |
| Astera Services 2207 W Merced Ave, West Covina 91790 | (626) 869-0425 |
| B E Metal Deburring Svc 1421 W Village Ln, West Covina 91790 | (626) 813-0348 |
| E & E Product & Svc Inc 1301 E Herring Ave, West Covina 91790 | (626) 458-4884 |
| Fire Protection Systems 1417 E Verness St, West Covina 91791 | (626) 966-0955 |