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Random California ZIP Code Generator

Random real 5-digit California ZIP Codes by city. Each result keeps its reference city and state pairing together for realistic test data.

Find ZIP Codes by US State

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About California ZIP Codes

California ZIP Codes primarily span the 900xx–961xx range. The leading digit 9 places the state in the western US mail-routing area, while the remaining digits narrow mail to processing and local delivery areas.

Major metro areas commonly use distinct three-digit prefixes: Los Angeles includes many 900xx and 902xx codes, San Diego commonly uses 921xx, San Francisco 941xx, and Sacramento 958xx. ZIP Codes describe delivery routes rather than exact city or county boundaries.

900xx–961xx

Primary ZIP range

Routing areas from Southern to Northern California

9

Leading digit

The broad western US mail-routing area

900 · 921 · 941 · 958

Example metro prefixes

Los Angeles, San Diego, San Francisco, and Sacramento

Frequently Asked Questions

California ZIP Codes primarily span 900xx–961xx. Individual codes support USPS mail routes and do not define exact city or county boundaries.