517 California cities and counties with verified pages, grouped by what their code does. 24 more are checked but held back until their records meet the publishing standard. The checker itself answers any address in California.
The checker resolves any California address to its jurisdiction and returns these rules with their verification level. Where a county or city publishes a licensed-rental registry or parcel map (Riverside County, San Diego, Palm Springs, and a growing list), it also runs parcel spacing, permit cap, and registry checks.