| Business | Phone |
| Allied Electronics 2930 Inland Empire Blvd # 102, Ontario 91764 | (909) 980-6522 |
| Arrow Electronics Inc 1251 S Rockefeller Ave, Ontario 91761 | (909) 472-3600 |
| Consolidated Electrical Distr 1241 Brooks St, Ontario 91762 | (909) 983-2654 |
| Eaton Corp Satellite Plant 5590 Jurupa St, Ontario 91761 | (909) 390-8853 |
| L G Electronics Ontario Iqc 2021 S Archibald Ave, Ontario 91761 | (909) 923-1925 |
| Marvac Wharehouse 7812 Chino Ave, Ontario 91761 | (909) 947-7111 |
| Memtek Products Inc 930 S Rockefeller Ave, Ontario 91761 | (909) 937-9896 |
| Miracle Business Inc 1344 S Parkside Pl, Ontario 91761 | (909) 930-9911 |
| Osram Sylvania 1651 S Archibald Ave, Ontario 91761 | (909) 923-3003 |
| Tech Electronic Systems 592 E State St, Ontario 91761 | (909) 986-4395 |
| Testel Systems Corp 1522 E Francis St # B, Ontario 91761 | (909) 548-0331 |