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/646

ZIP codes starting with 646

ZIP codes
55
States
MO
Largest city
Chillicothe, MO
Population
68,750

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 646xx

ZIP codes starting with 646
ZIP City Type Population Median income Median home
64601 Chillicothe , MO Standard 12,189 $63,061 $153,900
64620 Altamont , MO Standard 626 $74,464 $243,800
64622 Bogard , MO Standard 718 $80,577 $85,000
64623 Bosworth , MO Standard 464 $53,359 $65,500
64624 Braymer , MO Standard 1,489 $58,095 $95,500
64625 Breckenridge , MO Standard 738 $35,000 $64,300
64628 Brookfield , MO Standard 5,661 $59,361 $123,500
64630 Browning , MO Standard 495 $57,813 $148,100
64631 Bucklin , MO Standard 836 $59,917 $110,300
64632 Cainsville , MO Standard 371 $50,313 $79,600
64633 Carrollton , MO Standard 4,346 $58,726 $128,400
64635 Chula , MO Standard 508 $78,333 $139,600
64636 Coffey , MO Standard 217 $34,167 $113,300
64637 Cowgill , MO Standard 492 $56,944 $125,000
64638 Dawn , MO Standard 470 $63,654 $244,600
64639 De Witt , MO Standard 113 $59,107 $74,200
64640 Gallatin , MO Standard 3,125 $61,302 $194,300
64641 Galt , MO Standard 625 $49,545 $137,500
64642 Gilman City , MO Standard 804 $64,107 $94,500
64643 Hale , MO Standard 1,088 $56,688 $113,000
64644 Hamilton , MO Standard 2,923 $74,408 $193,600
64645 Harris , MO Standard 195 $53,125 —
64646 Humphreys , MO Standard 471 $68,125 —
64647 Jameson , MO Standard 423 $51,250 $121,900
64648 Jamesport , MO Standard 2,396 $74,821 $107,900
64649 Kidder , MO Standard 814 $67,216 $228,100
64650 Kingston , MO Standard 665 $45,441 $203,100
64651 Laclede , MO Standard 461 $72,321 $78,000
64652 Laredo , MO Standard 346 $58,750 $176,400
64653 Linneus , MO Standard 431 $54,821 $107,800
64654 Lock Springs , MO Standard 49 $97,188 $121,900
64655 Lucerne , MO Standard 93 — —
64656 Ludlow , MO Standard 237 $58,438 $107,400
64657 Mc Fall , MO Standard 266 $59,659 $139,000
64658 Marceline , MO Standard 3,147 $75,848 $144,700
64659 Meadville , MO Standard 793 $73,698 $142,800
64660 Mendon , MO Standard 444 $80,000 $219,200
64661 Mercer , MO Standard 757 $54,122 $73,800
64664 Mooresville , MO Standard 244 $73,125 $133,300
64667 Newtown , MO Standard 255 $47,841 $90,000
64668 Norborne , MO Standard 1,278 $73,889 $119,900
64670 Pattonsburg , MO Standard 1,007 $52,083 $177,400
64671 Polo , MO Standard 1,986 $75,455 $173,200
64672 Powersville , MO Standard 185 $43,250 —
64673 Princeton , MO Standard 2,497 $61,364 $101,600
64674 Purdin , MO Standard 409 $70,000 $116,200
64676 Rothville , MO Standard 132 $59,519 $84,700
64679 Spickard , MO Standard 921 $53,611 $118,100
64680 Stet , MO No street area — — —
64681 Sumner , MO Standard 170 $70,833 $80,600
64682 Tina , MO Standard 411 $54,886 $119,900
64683 Trenton , MO Standard 7,631 $52,109 $110,000
64686 Utica , MO Standard 211 $71,563 $112,500
64688 Wheeling , MO Standard 705 $67,679 $132,500
64689 Winston , MO Standard 422 $62,206 $121,400

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zipcodes.pro. “ZIP codes starting with 646.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/646

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