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/031

ZIP codes starting with 031

ZIP codes
10
States
NH
Largest city
Manchester, NH
Population
158,879

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 031xx

ZIP codes starting with 031
ZIP City Type Population Median income Median home
03101 Manchester , NH Standard 3,201 $84,434 $429,300
03102 Manchester , NH Standard 33,959 $74,327 $343,300
03103 Manchester , NH Standard 37,775 $73,540 $342,200
03104 Manchester , NH Standard 35,237 $88,897 $392,200
03105 Manchester , NH No street area — — —
03106 Hooksett , NH Standard 15,032 $118,442 $408,400
03108 Manchester , NH No street area — — —
03109 Manchester , NH Standard 9,929 $108,144 $387,900
03110 Bedford , NH Standard 23,746 $167,418 $612,100
03111 Manchester , NH No street area — — —

Cite this page

zipcodes.pro. “ZIP codes starting with 031.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/031

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