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/940

ZIP codes starting with 940

ZIP codes
45
States
CA
Largest city
South San Francisco, CA
Population
855,354

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 940xx

ZIP codes starting with 940
ZIP City Type Population Median income Median home
94002 Belmont , CA Standard 27,534 $203,965 $2,000,000+
94005 Brisbane , CA Standard 4,692 $156,169 $1,232,200
94010 Burlingame , CA Standard 43,025 $196,882 $2,000,000+
94011 Burlingame , CA No street area — — —
94014 Daly City , CA Standard 45,315 $122,966 $1,036,900
94015 Daly City , CA Standard 64,091 $127,056 $1,165,500
94016 Daly City , CA No street area — — —
94017 Daly City , CA No street area — — —
94018 El Granada , CA Standard 3,834 $230,053 $1,430,200
94019 Half Moon Bay , CA Standard 14,419 $153,781 $1,556,800
94020 La Honda , CA Standard 1,694 $250,000+ $995,900
94021 Loma Mar , CA Standard 321 $250,000+ $1,073,100
94022 Los Altos , CA Standard 20,027 $250,000+ $2,000,000+
94023 Los Altos , CA No street area — — —
94024 Los Altos , CA Standard 23,051 $250,000+ $2,000,000+
94025 Menlo Park , CA Standard 40,721 $216,601 $2,000,000+
94026 Menlo Park , CA No street area — — —
94027 Atherton , CA Standard 7,002 $250,000+ $2,000,000+
94028 Portola Valley , CA Standard 6,531 $250,000+ $2,000,000+
94030 Millbrae , CA Standard 22,689 $163,476 $1,934,900
94035 Mountain View , CA No street area — — —
94037 Montara , CA Standard 2,917 $233,826 $1,580,700
94038 Moss Beach , CA Standard 2,683 $99,680 $1,123,100
94039 Mountain View , CA No street area — — —
94040 Mountain View , CA Standard 35,632 $187,781 $2,000,000+
94041 Mountain View , CA Standard 16,050 $178,558 $2,000,000+
94042 Mountain View , CA No street area — — —
94043 Mountain View , CA Standard 33,176 $203,298 $1,641,100
94044 Pacifica , CA Standard 37,274 $160,408 $1,249,800
94060 Pescadero , CA Standard 1,465 $127,973 $1,401,500
94061 Redwood City , CA Standard 37,048 $146,265 $1,900,500
94062 Redwood City , CA Standard 25,759 $233,262 $2,000,000+
94063 Redwood City , CA Standard 34,433 $116,760 $1,042,500
94064 Redwood City , CA No street area — — —
94065 Redwood City , CA Standard 11,673 $215,955 $1,811,800
94066 San Bruno , CA Standard 42,728 $141,272 $1,207,500
94070 San Carlos , CA Standard 30,447 $240,074 $2,000,000+
94074 San Gregorio , CA Standard 126 $250,000+ —
94080 South San Francisco , CA Standard 64,761 $136,733 $1,188,700
94083 South San Francisco , CA No street area — — —
94085 Sunnyvale , CA Standard 24,024 $192,417 $1,534,400
94086 Sunnyvale , CA Standard 49,746 $177,054 $1,810,200
94087 Sunnyvale , CA Standard 57,767 $207,742 $2,000,000+
94088 Sunnyvale , CA No street area — — —
94089 Sunnyvale , CA Standard 22,699 $158,304 $387,800

Cite this page

zipcodes.pro. “ZIP codes starting with 940.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/940

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