442 is the North American telephone area code for the state of California, including the cities of Apple Valley, Barstow, Brawley, Calexico, Carlsbad, Cathedral City, Coachella, El Centro, Encinitas, Escondido, Fallbrook, Hesperia, Indio, La Quinta, Oceanside, Palm Desert, Palm Springs, Ridgecrest, San Marcos, Victorville, and Vista.
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| Prefix | Primary City | Company | County | Usage |
|---|---|---|---|---|
| 442-222-#### | Oceanside, CA | Cf Communications DBA Telekenex | Unknown | |
| 442-242-#### | Metropcs Networks | Unknown | ||
| 442-333-#### | Oceanside, CA | Telcentris Communications | Unknown | |
| 442-444-#### | Fallbrook, CA | Cf Communications DBA Telekenex | Unknown | |
| 442-777-#### | Escondido, CA | Telcentris Communications | Unknown | |
| 442-888-#### | Oceanside, CA | Telcentris Communications | Unknown | |
| 442-200-#### | Calexico | Cf Communications DBA Telekenex | Landline | |
| 442-220-#### | Nipton | Telcentris Communications | Landline | |
| 442-221-#### | Benton | Bandwidth.com Clec | Landline | |
| 442-223-#### | Newberry Springs | Peerless Network Of California | Landline | |
| 442-224-#### | Vista | Time Warner Cbl Info Svcs (ca) DBAtime Warner Cbl | Landline | |
| 442-225-#### | El Centro | Flat West Wireless | Wireless | |
| 442-226-#### | Brawley | T-mobile Usa | Wireless | |
| 442-227-#### | Palm Springs | Wide Voice | Landline | |
| 442-228-#### | Bishop | Cebridge Telecom Ca DBA Suddenlink Comms | Landline | |
| 442-229-#### | Victorville | Bandwidth.com Clec | Landline | |
| 442-231-#### | El Centro | Flat West Wireless | Wireless | |
| 442-232-#### | Carlsbad | Level 3 Communications | Landline | |
| 442-233-#### | Bandwidth.com Clec | Unknown | ||
| 442-234-#### | Palm Springs | Peerless Network Of California | Landline | |
| 442-235-#### | Cellco Partnership DBA Verizon Wireless | Unknown | ||
| 442-236-#### | El Centro | New Cingular Wireless PCS | Wireless | |
| 442-237-#### | Metro PCS | Unknown | ||
| 442-238-#### | Flat West Wireless | Unknown | ||
| 442-243-#### | Cellco Partnership DBA Verizon Wireless | Unknown | ||
| 442-244-#### | Carlsbad | Time Warner Cbl Info Svcs (ca) DBAtime Warner Cbl | Landline | |
| 442-246-#### | Mci Worldcom Communications, Ca | Unknown | ||
| 442-253-#### | Centurylink Communications LLC | Unknown | ||
| 442-281-#### | Escondido | Pacific Bell | Landline | |
| 442-300-#### | Indio | Cf Communications DBA Telekenex | Landline | |
| 442-321-#### | Mci Worldcom Communications, Ca | Unknown | ||
| 442-400-#### | Indio | Cf Communications DBA Telekenex | Landline | |
| 442-500-#### | Oceanside | Cf Communications DBA Telekenex | Landline | |
| 442-600-#### | Hesperia | Cf Communications DBA Telekenex | Landline | |
| 442-666-#### | Palm Springs | Cf Communications DBA Telekenex | Landline | |
| 442-800-#### | Hesperia | Cf Communications DBA Telekenex | Landline | |
| 442-900-#### | El Centro | Cf Communications DBA Telekenex | Landline | |
| 442-999-#### | Escondido | Cf Communications DBA Telekenex | Landline |