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/910

ZIP codes starting with 910

ZIP codes
25
States
CA
Largest city
Monrovia, CA
Population
281,897

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 910xx

ZIP codes starting with 910
ZIP City Type Population Median income Median home
91001 Altadena , CA Standard 35,475 $134,903 $1,135,200
91003 Altadena , CA No street area — — —
91006 Arcadia , CA Standard 31,582 $123,533 $1,260,000
91007 Arcadia , CA Standard 33,029 $100,705 $1,277,900
91008 Duarte , CA Standard 743 $164,375 $1,812,500
91009 Duarte , CA No street area — — —
91010 Duarte , CA Standard 27,589 $102,705 $756,500
91011 La Canada Flintridge , CA Standard 19,935 $241,875 $2,000,000+
91012 La Canada Flintridge , CA No street area — — —
91016 Monrovia , CA Standard 41,140 $96,540 $896,700
91017 Monrovia , CA No street area — — —
91020 Montrose , CA Standard 7,532 $72,125 $911,200
91021 Montrose , CA No street area — — —
91023 Mount Wilson , CA No street area — — —
91024 Sierra Madre , CA Standard 10,940 $143,547 $1,226,800
91025 Sierra Madre , CA No street area — — —
91030 South Pasadena , CA Standard 26,068 $127,175 $1,640,000
91031 South Pasadena , CA No street area — — —
91040 Sunland , CA Standard 20,821 $98,256 $861,600
91041 Sunland , CA No street area — — —
91042 Tujunga , CA Standard 26,928 $85,603 $840,800
91043 Tujunga , CA No street area — — —
91046 Verdugo City , CA Standard 115 — —
91066 Arcadia , CA No street area — — —
91077 Arcadia , CA No street area — — —

Cite this page

zipcodes.pro. “ZIP codes starting with 910.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/910

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