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/911

ZIP codes starting with 911

ZIP codes
27
States
CA
Largest city
Pasadena, CA
Population
164,402

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 911xx

ZIP codes starting with 911
ZIP City Type Population Median income Median home
91101 Pasadena , CA Standard 21,165 $87,813 $682,300
91102 Pasadena , CA No street area — — —
91103 Pasadena , CA Standard 25,142 $93,660 $983,300
91104 Pasadena , CA Standard 35,937 $105,958 $1,080,100
91105 Pasadena , CA Standard 12,531 $156,791 $1,671,000
91106 Pasadena , CA Standard 23,910 $90,028 $1,040,400
91107 Pasadena , CA Standard 32,316 $126,449 $1,155,300
91108 San Marino , CA Standard 12,401 $204,847 $2,000,000+
91109 Pasadena , CA No street area — — —
91110 Pasadena , CA No street area — — —
91114 Pasadena , CA No street area — — —
91115 Pasadena , CA No street area — — —
91116 Pasadena , CA No street area — — —
91117 Pasadena , CA No street area — — —
91118 San Marino , CA No street area — — —
91121 Pasadena , CA No street area — — —
91123 Pasadena , CA No street area — — —
91124 Pasadena , CA No street area — — —
91125 Pasadena , CA Standard 1,000 — —
91126 Pasadena , CA No street area — — —
91129 Pasadena , CA No street area — — —
91182 Pasadena , CA No street area — — —
91184 Pasadena , CA No street area — — —
91185 Pasadena , CA No street area — — —
91188 Pasadena , CA No street area — — —
91189 Pasadena , CA No street area — — —
91199 Pasadena , CA No street area — — —

Cite this page

zipcodes.pro. “ZIP codes starting with 911.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/911

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