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/311

ZIP codes starting with 311

ZIP codes
18
States
GA
Largest city
Atlanta, GA

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 311xx

ZIP codes starting with 311
ZIP City Type
31106 Atlanta , GA No street area
31107 Atlanta , GA No street area
31119 Atlanta , GA No street area
31126 Atlanta , GA No street area
31131 Atlanta , GA No street area
31136 Atlanta , GA No street area
31139 Atlanta , GA No street area
31141 Atlanta , GA No street area
31144 Kennesaw , GA No street area
31145 Atlanta , GA No street area
31146 Atlanta , GA No street area
31150 Atlanta , GA No street area
31156 Atlanta , GA No street area
31169 Peachtree City , GA No street area
31192 Atlanta , GA No street area
31193 Atlanta , GA No street area
31195 Atlanta , GA No street area
31196 Atlanta , GA No street area

Cite this page

zipcodes.pro. “ZIP codes starting with 311.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/311

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