| 442-200 | Calexico, CA | Landline | Cf Communications DBA Telekenex |
| 442-220 | Nipton, CA | Landline | Telcentris Communications |
| 442-221 | Benton, CA | Landline | Bandwidth.com Clec |
| 442-222 | Oceanside, CA | Landline | Cf Communications DBA Telekenex |
| 442-223 | Newberry Springs, CA | Landline | Peerless Network Of California |
| 442-224 | Vista, CA | Landline | Time Warner Cbl Info Svcs (ca) DBAtime Warner Cbl |
| 442-225 | El Centro, CA | Wireless | Flat West Wireless |
| 442-226 | Brawley, CA | Wireless | T-mobile Usa |
| 442-227 | Palm Springs, CA | Landline | Wide Voice |
| 442-228 | Bishop, CA | Landline | Cebridge Telecom Ca DBA Suddenlink Comms |
| 442-229 | Victorville, CA | Landline | Bandwidth.com Clec |
| 442-231 | El Centro, CA | Wireless | Flat West Wireless |
| 442-232 | Carlsbad, CA | Landline | Level 3 Communications |
| 442-233 | | Landline | Bandwidth.com Clec |
| 442-234 | Palm Springs, CA | Landline | Peerless Network Of California |
| 442-235 | | Wireless | Cellco Partnership DBA Verizon Wireless |
| 442-236 | El Centro, CA | Wireless | New Cingular Wireless PCS |
| 442-237 | | Wireless | Metro PCS |
| 442-238 | | Wireless | Flat West Wireless |
| 442-242 | Victorville, CA | Landline | Metropcs Networks |
| 442-243 | | Wireless | Cellco Partnership DBA Verizon Wireless |
| 442-244 | Carlsbad, CA | Landline | Time Warner Cbl Info Svcs (ca) DBAtime Warner Cbl |
| 442-246 | | Landline | Mci Worldcom Communications, Ca |
| 442-253 | | Landline | Centurylink Communications LLC |
| 442-281 | Escondido, CA | Landline | Pacific Bell |
| 442-300 | Indio, CA | Landline | Cf Communications DBA Telekenex |
| 442-321 | | Landline | Mci Worldcom Communications, Ca |
| 442-333 | Oceanside, CA | Landline | Telcentris Communications |
| 442-400 | Indio, CA | Landline | Cf Communications DBA Telekenex |
| 442-444 | Fallbrook, CA | Landline | Cf Communications DBA Telekenex |
| 442-500 | Oceanside, CA | Landline | Cf Communications DBA Telekenex |
| 442-600 | Hesperia, CA | Landline | Cf Communications DBA Telekenex |
| 442-666 | Palm Springs, CA | Landline | Cf Communications DBA Telekenex |
| 442-777 | Escondido, CA | Landline | Telcentris Communications |
| 442-800 | Hesperia, CA | Landline | Cf Communications DBA Telekenex |
| 442-888 | Oceanside, CA | Landline | Telcentris Communications |
| 442-900 | El Centro, CA | Landline | Cf Communications DBA Telekenex |
| 442-999 | Escondido, CA | Landline | Cf Communications DBA Telekenex |