| Business | Phone |
| Advance Teleco Usa Inc 909 Center St, Riverside 92507 | (951) 784-0663 |
| Com Ser Co 2020 Iowa Ave # 100, Riverside 92507 | (951) 781-2940 |
| Lynch Communications Inc 570 E La Cadena Dr, Riverside 92501 | (951) 786-0474 |
| Abba Communications 2061 3rd St, Riverside 92507 | (951) 778-9800 |
| Alpha Omega Communications 7900 Limonite Ave, Riverside 92509 | (951) 681-5644 |
| Aslyn Communications 5041 Lamart Dr, Riverside 92507 | (951) 300-2157 |
| Eagle 28 Telecomunications 8982 Brunswick Ave, Riverside 92503 | (951) 359-0899 |
| G L Technology 11302 Cypress Ave, Riverside 92505 | (951) 343-5900 |
| National Cellular Inc 3700 Van Buren Blvd, Riverside 92503 | (951) 688-6599 |
| Telecon 4800 Magnolia Ave, Riverside 92506 | (951) 788-4830 |
| Ofp Comm-Net 10390 Branigan Way, Riverside 92505 | (909) 424-3488 |
| Ptg Communications 4505 Allstate Dr # 13, Riverside 92501 | (951) 928-1772 |