| Business | Phone |
| Cierra Telecom 350 Rimhurst Ct, Oceanside 92054 | (760) 721-9749 |
| Digital Communications 323 N Coast Hwy # G, Oceanside 92054 | (760) 414-9171 |
| Dialtel 4225 Bonita Dr, Oceanside 92056 | (760) 806-3284 |
| Hughes Telecommunications 1224 Masterpiece Dr, Oceanside 92057 | (760) 966-7555 |