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/918

ZIP codes starting with 918

ZIP codes
6
States
CA
Largest city
Alhambra, CA
Population
81,096

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 918xx

ZIP codes starting with 918
ZIP City Type Population Median income Median home
91801 Alhambra , CA Standard 53,381 $89,156 $834,000
91802 Alhambra , CA No street area — — —
91803 Alhambra , CA Standard 27,715 $84,311 $888,600
91804 Alhambra , CA No street area — — —
91896 Alhambra , CA No street area — — —
91899 Alhambra , CA No street area — — —

Cite this page

zipcodes.pro. “ZIP codes starting with 918.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/918

Underlying data is public domain or openly licensed — sources, vintages and licences.