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/034

ZIP codes starting with 034

ZIP codes
28
States
NH
Largest city
Keene, NH
Population
84,977

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 034xx

ZIP codes starting with 034
ZIP City Type Population Median income Median home
03431 Keene , NH Standard 25,065 $79,541 $255,500
03435 Keene , NH No street area — — —
03440 Antrim , NH Standard 2,661 $88,889 $300,000
03441 Ashuelot , NH Standard 593 $53,816 $283,500
03442 Bennington , NH Standard 1,588 $83,875 $267,300
03443 Chesterfield , NH Standard 581 — $373,300
03444 Dublin , NH Standard 1,666 $104,773 $429,600
03445 Sullivan , NH Standard 687 $106,667 $236,500
03446 Swanzey , NH Standard 6,588 $85,484 $262,100
03447 Fitzwilliam , NH Standard 2,278 $100,735 $305,900
03448 Gilsum , NH Standard 716 $80,417 $241,500
03449 Hancock , NH Standard 1,838 $92,708 $432,200
03450 Harrisville , NH Standard 885 $103,036 $430,500
03451 Hinsdale , NH Standard 3,997 $69,191 $200,700
03452 Jaffrey , NH Standard 5,448 $92,330 $245,500
03455 Marlborough , NH Standard 2,242 $69,395 $268,000
03456 Marlow , NH Standard 855 $110,455 $325,400
03457 Nelson , NH Standard 802 $100,625 $353,300
03458 Peterborough , NH Standard 6,872 $98,684 $413,600
03461 Rindge , NH Standard 6,497 $102,679 $415,400
03462 Spofford , NH Standard 1,726 $115,313 $396,200
03464 Stoddard , NH Standard 902 $93,625 $325,000
03465 Troy , NH Standard 2,005 $88,871 $266,600
03466 West Chesterfield , NH Standard 1,315 $83,281 $343,900
03467 Westmoreland , NH Standard 2,237 $104,444 $351,800
03468 West Peterborough , NH No street area — — —
03469 West Swanzey , NH No street area — — —
03470 Winchester , NH Standard 4,933 $79,028 $252,800

Cite this page

zipcodes.pro. “ZIP codes starting with 034.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/034

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