U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

42,735 verified records
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Baltimore city ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Baltimore city.

County State ZIP Code City Area Codes
Baltimore city MD 21215 Baltimore 410, 443, 667
Baltimore city MD 21216 Baltimore 410, 443, 667
Baltimore city MD 21217 Baltimore 410, 443, 667
Baltimore city MD 21218 Baltimore 410, 443, 667
Baltimore city MD 21223 Baltimore 410, 443, 667
Baltimore city MD 21224 Baltimore 410, 443, 667
Baltimore city MD 21225 Brooklyn 410, 443, 667
Baltimore city MD 21229 Baltimore 410, 443, 667
Baltimore city MD 21230 Baltimore 410, 443, 667
Baltimore city MD 21231 Baltimore 410, 443, 667
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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.