| Business | Phone |
| Intech Systems 1430 3rd St, Riverside 92507 | (951) 788-9988 |
| A Line Telephone Po Box 20702, Riverside 92516 | (951) 736-0666 |
| Ace Communications 7528 Magnolia Ave # 4, Riverside 92504 | (951) 637-1014 |
| Advanced Teletronics 4074 Seymour St, Riverside 92505 | (951) 351-8353 |
| Choice Communication Systems 6752 Misty Ridge Dr, Riverside 92505 | (951) 352-3400 |
| Jitney Co Inc 8413 63rd St, Riverside 92509 | (951) 681-7128 |
| Lazer Communications 6827 Magnolia Ave, Riverside 92506 | (951) 788-6000 |
| Metro Tell Business Svc 8721 Saranac Pl, Riverside 92508 | (951) 656-4400 |
| Wilkerson Communications 2675 3rd St # K, Riverside 92507 | (951) 784-1340 |
| Wire Express 1120 Palmyrita Ave # 220, Riverside 92507 | (951) 248-4900 |