| Business | Phone |
| Abba Communications 3350 Shelby St # 200, Ontario 91764 | (909) 829-9200 |
| Mastec North America Inc 1701 S Grove Ave, Ontario 91761 | (909) 773-1145 |
| Leon Telecom 1221 E 4th St, Ontario 91764 | (909) 635-1919 |
| Time Warner Telecom 430 N Vineyard Ave, Ontario 91764 | (909) 456-3600 |
| Verizon Communications 3633 Inland Empire Blvd # 600, Ontario 91764 | (909) 944-6122 |
| Verizon Plus 990 Ontario Mills Dr # C, Ontario 91764 | (909) 481-1134 |
| Time Warner Telecom 3281 E Guasti Rd # 350, Ontario 91761 | (909) 456-3600 |