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Comprehensive lookup for US postal codes. Find cities, counties, and timezones instantly.
ZIP codes (Zone Improvement Plan) were introduced by the USPS in 1963 to improve mail sorting and delivery. Today, they are used for much more than just mail—providing vital geographic and demographic data for business and research.
Our database covers thousands of ZIP codes across all 50 states, including city names, full state names, and standardized timezones.