| Business | Phone |
| Black Box Network Svc 10860 6th St, Rancho Cucamonga 91730 | (909) 476-4400 |
| Communication Resources Inc 8560 Vineyard Ave # 405, Rancho Cucamonga 91730 | (909) 484-8495 |
| New Age Communications 9007 Arrow Rte # 140, Rancho Cucamonga 91730 | (909) 937-2004 |
| Telaid 10572 Acacia St # C6, Rancho Cucamonga 91730 | (909) 941-7511 |