Oxnard, CA Area Codes

Area codes serving Oxnard

Oxnard sits in California, part of the West region and the Pacific Time zone. Its numbers are spread across an overlay of 2 codes that all cover the same ground: 805, 820.

The original code is 805 (in service since 1957). As the area ran low on numbers, regulators added overlay codes on top instead of splitting the city, so longtime residents kept their numbers while new lines received a newer code.

Code	Area served	In service
805	California Central Coast: Ventura, Santa Barbara and San Luis Obispo counties	January 1, 1957
820	California Central Coast: Ventura, Santa Barbara and San Luis Obispo counties	June 30, 2018

Nearby cities sharing these area codes

• Thousand Oaks
• Simi Valley
• Ventura
• Santa Maria
• Camarillo
• Santa Barbara
• San Luis Obispo
• Moorpark
• Lompoc
• Goleta
• Paso Robles
• Atascadero

How to pick an area code for a new number

When you activate a new line in Oxnard, the carrier assigns whichever code has numbers available — you usually can't choose. If a specific code matters to you (for example the prestige of 805), ask the carrier whether any blocks remain, or request a number transfer. All codes here dial identically and cost the same.

Dialing in Oxnard

Because Oxnard is an overlay area, 10-digit dialing is mandatory: always dial the area code plus the seven-digit number, even for a neighbor. See 10-digit dialing and overlay area codes for the background. For every code in California, visit the California area codes page.