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/340

ZIP codes starting with 340

ZIP codes
38
States
AA
Largest city
APO AA, AA

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 340xx

ZIP codes starting with 340
ZIP City Type
34002 APO AA , AA Military (APO/FPO/DPO)
34003 APO AA , AA Military (APO/FPO/DPO)
34004 APO AA , AA Military (APO/FPO/DPO)
34005 APO AA , AA Military (APO/FPO/DPO)
34006 APO AA , AA Military (APO/FPO/DPO)
34007 APO AA , AA Military (APO/FPO/DPO)
34008 APO AA , AA Military (APO/FPO/DPO)
34009 APO AA , AA Military (APO/FPO/DPO)
34010 APO AA , AA Military (APO/FPO/DPO)
34011 APO AA , AA Military (APO/FPO/DPO)
34020 APO AA , AA Military (APO/FPO/DPO)
34021 APO AA , AA Military (APO/FPO/DPO)
34022 APO AA , AA Military (APO/FPO/DPO)
34023 APO AA , AA Military (APO/FPO/DPO)
34024 APO AA , AA Military (APO/FPO/DPO)
34030 APO AA , AA Military (APO/FPO/DPO)
34031 APO AA , AA Military (APO/FPO/DPO)
34032 APO AA , AA Military (APO/FPO/DPO)
34033 APO AA , AA Military (APO/FPO/DPO)
34034 APO AA , AA Military (APO/FPO/DPO)
34035 APO AA , AA Military (APO/FPO/DPO)
34036 APO AA , AA Military (APO/FPO/DPO)
34037 APO AA , AA Military (APO/FPO/DPO)
34038 APO AA , AA Military (APO/FPO/DPO)
34039 APO AA , AA Military (APO/FPO/DPO)
34040 APO AA , AA Military (APO/FPO/DPO)
34041 APO AA , AA Military (APO/FPO/DPO)
34042 APO AA , AA Military (APO/FPO/DPO)
34045 APO AA , AA Military (APO/FPO/DPO)
34046 APO AA , AA Military (APO/FPO/DPO)
34050 FPO AA , AA Military (APO/FPO/DPO)
34051 FPO AA , AA Military (APO/FPO/DPO)
34053 FPO AA , AA Military (APO/FPO/DPO)
34054 FPO AA , AA Military (APO/FPO/DPO)
34058 FPO AA , AA Military (APO/FPO/DPO)
34059 FPO AA , AA Military (APO/FPO/DPO)
34060 FPO AA , AA Military (APO/FPO/DPO)
34061 FPO AA , AA Military (APO/FPO/DPO)

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zipcodes.pro. “ZIP codes starting with 340.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/340

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