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 — ZIP/94083

94083

ZIP 94083 is in South San Francisco, California, in San Mateo County; area code 650; Pacific time. South San Francisco has 2 ZIP codes; the other is 94080.

Type
No street area
Time zone
America/Los_Angeles
County
San Mateo
Coordinates
37.6547, -122.4077

The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

This ZIP code has no Census tabulation area of its own. Its point falls inside ZCTA 94080, whose figures describe that area — not this ZIP code.

☼ Live from 94083 — South San Francisco, CA

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Where 94083 is

This ZIP code has no Census tabulation area, so there is no boundary to draw — the marker is its published point location.

★ Weird and wonderful facts about 94083
  • 🔢 Type 94083 into a pocket calculator and turn it upside down: EBOhG — not quite a word, sorry.
  • ➕ As a number, 94,083 = 3 × 11 × 2851. Its digits add up to 24, a total 2,425 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110111110000011
  • 🏠 Its numerical neighbours: 94080 (South San Francisco, CA, 1 mi away) and 94085 (Sunnyvale, CA, 28 mi away).
  • 🔄 Backwards, 94083 becomes 38049 — and that is a real ZIP code: Mason, TN, 1,822 miles away.
  • 👥 39 other ZIP codes are made of exactly the same digits (03849, 03894, 04938, 04983, 08349, 09834, …). The farthest-flung twin is 09834 in FPO AE, a military post office, 8,001 miles away.
  • 🧭 Farther south than 60% of all ZIP codes, and farther west than 96%.
  • 🎯1,289 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 94083 and you would come out at 37.65°S, 57.59°E — 1,023 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 46m of daylight. Shortest: 9h 33m.
🌙 The sky over 94083 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments15This ZIP15
Employees129This ZIP129
Annual payroll$8,332,000This ZIP$8,332,000

Land area

ZIP codes near 94083

ZIPCityDistance
94080 South San Francisco, CA 0.6 mi
94005 Brisbane, CA 2.4 mi
94066 San Bruno, CA 2.4 mi
94128 San Francisco, CA 2.6 mi
94014 Daly City, CA 3.3 mi
94030 Millbrae, CA 3.8 mi
94015 Daly City, CA 4.4 mi
94134 San Francisco, CA 4.4 mi
94016 Daly City, CA 4.6 mi
94017 Daly City, CA 4.6 mi

Find every ZIP code within 10 miles of 94083 →

Questions about this ZIP code

Where is ZIP code 94083?

94083 is in South San Francisco, California, in San Mateo County, part of the San Francisco-Oakland-Fremont, CA metropolitan area. Its published point location is 37.6547, -122.4077.

What county is 94083 in?

94083 lies in San Mateo County.

What area code is 94083?

South San Francisco uses area code 650, from NANPA's telephone records.

What time zone is 94083 in?

94083 uses America/Los_Angeles.

What ZIP codes are near 94083?

The closest are 94080 (0.6 mi), 94005 (2.4 mi), 94066 (2.4 mi), 94128 (2.6 mi) and 94014 (3.3 mi).

Is 94083 a PO Box ZIP code?

Possibly. The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

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Cite this page

zipcodes.pro. “94083 ZIP Code — South San Francisco, California (San Mateo County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94083

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/94083.json

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