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/401

ZIP codes starting with 401

ZIP codes
36
States
KY
Largest city
Shepherdsville, KY
Population
156,448

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 401xx

ZIP codes starting with 401
ZIP City Type Population Median income Median home
40104 Battletown , KY Standard 1,143 $71,111 $150,000
40107 Boston , KY Standard 2,187 $60,398 $204,000
40108 Brandenburg , KY Standard 12,821 $77,559 $221,800
40109 Brooks , KY Standard 2,376 $75,495 $262,400
40110 Clermont , KY Standard 440 $46,756 $172,200
40111 Cloverport , KY Standard 1,903 $41,576 $118,400
40115 Custer , KY Standard 1,012 $74,722 $149,100
40117 Ekron , KY Standard 2,050 $58,696 $196,700
40118 Fairdale , KY Standard 10,697 $59,316 $156,800
40119 Falls Of Rough , KY Standard 1,976 $65,500 $128,700
40121 Fort Knox , KY Standard 8,836 $82,663 —
40122 Fort Knox , KY No street area — — —
40129 Hillview , KY No street area — — —
40140 Garfield , KY Standard 866 $81,708 $135,900
40142 Guston , KY Standard 2,253 $81,037 $166,100
40143 Hardinsburg , KY Standard 5,756 $59,475 $155,900
40144 Harned , KY Standard 1,930 $41,711 $218,000
40145 Hudson , KY Standard 1,175 $34,237 $78,400
40146 Irvington , KY Standard 3,650 $54,167 $150,600
40150 Lebanon Junction , KY Standard 4,950 $65,500 $177,900
40152 Mc Daniels , KY Standard 728 $71,406 $173,900
40153 Mc Quady , KY No street area — — —
40155 Muldraugh , KY Standard 1,127 $60,508 $76,700
40157 Payneville , KY Standard 854 $58,750 $245,000
40159 Radcliff , KY No street area — — —
40160 Radcliff , KY Standard 23,624 $58,506 $165,900
40161 Rhodelia , KY Standard 182 $74,348 —
40162 Rineyville , KY Standard 6,180 $84,720 $304,600
40165 Shepherdsville , KY Standard 38,403 $79,540 $249,600
40166 Shepherdsville , KY No street area — — —
40170 Stephensport , KY Standard 396 — $342,500
40171 Union Star , KY Standard 272 $45,929 $81,800
40175 Vine Grove , KY Standard 15,718 $77,509 $223,800
40176 Webster , KY Standard 898 $62,422 $189,300
40177 West Point , KY Standard 1,523 $50,577 $122,200
40178 Westview , KY Standard 522 $53,576 —

Cite this page

zipcodes.pro. “ZIP codes starting with 401.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/401

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