Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — PREFIX/063

ZIP codes starting with 063

ZIP codes
40
States
CT and NY
Largest city
Norwich, CT
Population
263,470

The first three digits of a ZIP code identify a sectional center facility — the postal processing plant that sorts mail for the area. It is a mail-routing grouping, not an administrative boundary.

Every ZIP code in 063xx

ZIP codes starting with 063
ZIP City Type Population Median income Median home
06320 New London , CT Standard 27,703 $59,170 $253,300
06330 Baltic , CT Standard 3,327 $98,698 $279,400
06331 Canterbury , CT Standard 5,145 $103,198 $334,200
06332 Central Village , CT Standard 1,015 $61,840 $235,300
06333 East Lyme , CT Standard 7,389 $129,083 $439,000
06334 Bozrah , CT Standard 2,249 $107,969 $310,400
06335 Gales Ferry , CT Standard 6,307 $118,116 $322,400
06336 Gilman , CT Standard 44 $133,750 —
06338 Mashantucket , CT Standard 27 $137,500 $433,300
06339 Ledyard , CT Standard 9,113 $106,403 $330,500
06340 Groton , CT Standard 29,863 $81,792 $294,700
06349 Groton , CT No street area — — —
06350 Hanover , CT Standard 121 $40,950 —
06351 Jewett City , CT Standard 15,760 $82,976 $294,400
06353 Montville , CT Standard 439 — —
06354 Moosup , CT Standard 6,031 $87,711 $298,600
06355 Mystic , CT Standard 12,173 $137,425 $453,400
06357 Niantic , CT Standard 11,332 $93,026 $397,300
06359 North Stonington , CT Standard 5,160 $123,938 $397,100
06360 Norwich , CT Standard 37,216 $65,539 $245,700
06365 Preston , CT Standard 4,807 $117,045 $361,400
06370 Oakdale , CT Standard 7,327 $105,700 $332,500
06371 Old Lyme , CT Standard 9,828 $132,045 $499,400
06372 Old Mystic , CT No street area — — —
06373 Oneco , CT Standard 219 — $270,800
06374 Plainfield , CT Standard 7,838 $71,882 $248,700
06375 Quaker Hill , CT Standard 3,670 $111,833 $326,000
06376 South Lyme , CT Standard 89 $156,000 $444,400
06377 Sterling , CT Standard 2,927 $97,308 $275,900
06378 Stonington , CT Standard 5,555 $135,714 $593,400
06379 Pawcatuck , CT Standard 9,017 $95,066 $406,100
06380 Taftville , CT Standard 2,757 $63,452 $194,300
06382 Uncasville , CT Standard 10,143 $89,635 $267,800
06383 Versailles , CT No street area — — —
06384 Voluntown , CT Standard 2,663 $106,518 $354,900
06385 Waterford , CT Standard 15,966 $100,484 $365,400
06387 Wauregan , CT Standard 178 $108,787 $270,500
06388 West Mystic , CT No street area — — —
06389 Yantic , CT Standard 0 — —
06390 Fishers Island , NY Standard 72 $98,125 —

Cite this page

zipcodes.pro. “ZIP codes starting with 063.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/063

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