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 21268 Baltimore 410
Baltimore City MD 21270 Baltimore 410
Baltimore City MD 21273 Baltimore 410
Baltimore City MD 21274 Baltimore 410
Baltimore City MD 21275 Baltimore 410
Baltimore City MD 21278 Baltimore 410
Baltimore City MD 21279 Baltimore 410
Baltimore City MD 21280 Baltimore 410
Baltimore City MD 21281 Baltimore 410
Baltimore City MD 21282 Pikesville 410
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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.