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Castaic, CA Area Codes
Castaic, California (population 18,479) uses area codes 805 and 820.
Castaic has no telephone exchange of its own in NANPA records; it is served by the Piru exchange about 17.7 km away.
Carriers with Castaic numbers
5 prefixes are assigned to the Piru exchange: 0% mobile, 60% VoIP and cable, 40% landline.
| Carrier | Prefixes |
|---|---|
| Onvoy (Sinch) | 2 |
| AT&T (Pacific Bell) | 1 |
| Commio | 1 |
| Fractel | 1 |
Area codes used in Castaic
| Area code | Prefixes serving Castaic | Main carriers in this code |
|---|---|---|
| 805 | 3 | Frontier, AT&T (Pacific Bell), Verizon Wireless |
| 820 | 2 | Fractel, AT&T Mobility, Onvoy (Sinch) |
Castaic phone number prefixes
Numbers starting with these first six digits were originally assigned to the Piru exchange.
805-398Onvoy (Sinch)805-521AT&T (Pacific Bell)805-855Onvoy (Sinch)820-220Commio820-529Fractel
Nearby cities in area code 805
- Oxnard
- Simi Valley
- Thousand Oaks
- Santa Maria
- San Buenaventura
- Santa Barbara
- Camarillo
- San Luis Obispo
- Lompoc
- Moorpark
- Goleta
- Santa Paula
Questions
- What is the area code for Castaic, CA?
- Castaic uses 2 area codes: 805 and 820. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
- What time zone is Castaic in?
- Castaic is in the Pacific time zone.