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.

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New London County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in New London County.

County State ZIP Code City Area Codes
New London County CT 06249 Lebanon 860, 959
New London County CT 06254 North Franklin 860, 959
New London County CT 06320 New London 860, 959
New London County CT 06330 Baltic 860, 959
New London County CT 06333 East Lyme 860, 959
New London County CT 06334 Bozrah 860, 959
New London County CT 06335 Gales Ferry 860, 959
New London County CT 06336 Gilman 860, 959
New London County CT 06338 Mashantucket 860, 959
New London County CT 06339 Ledyard 860, 959
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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.