Look Up a ZIP Code
Covers all 50 US states. Puerto Rico and US territories not included in this tool.
Batch ZIP Lookup
Enter up to 20 ZIP codes (one per line or comma-separated) for a quick summary table.
What Is a ZIP Code?
ZIP (Zone Improvement Plan) codes were introduced by the USPS in 1963 to make mail sorting more efficient. The first digit identifies a broad region (0 = Northeast, 9 = West Coast).
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