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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State directory

Maine ZIP Codes

Complete postal directory, details, and geographic map for the State of Maine.

State ZIP Code City County Area Codes
ME 04428 Eddington Penobscot County 207
ME 04429 Holden Penobscot County 207
ME 04430 East Millinocket Penobscot County 207
ME 04431 East Orland Hancock County 207
ME 04434 Etna Penobscot County 207
ME 04435 Exeter Penobscot County 207
ME 04438 Frankfort Waldo County 207
ME 04441 Greenville Piscataquis County 207
ME 04442 Greenville Junction Piscataquis County 207
ME 04443 Guilford Piscataquis County 207
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Geographic Map of Maine

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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.