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/94999

94999

ZIP 94999 is in Petaluma, California, in Sonoma County; area codes 707 and 369; Pacific time. Petaluma has 6 ZIP codes; the others are 94952, 94953, 94954, 94955 and 94975.

Type
No street area
Time zone
America/Los_Angeles
County
Sonoma
Coordinates
38.2675, -122.6581

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 94954, whose figures describe that area — not this ZIP code.

☼ Live from 94999 — Petaluma, CA

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Where 94999 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 94999
  • 🔢 Type 94999 into a pocket calculator and turn it upside down: GGGhG — not quite a word, sorry.
  • ➕ 94999 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 40, a total 17 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111001100010111
  • 🏠 Its numerical neighbours: 94998 (Novato, CA, 11 mi away) and 95001 (Aptos, CA, 98 mi away).
  • 🔄 Backwards, 94999 becomes 99949, which is not a ZIP code at all.
  • 🧭 Farther south than 56% of all ZIP codes, and farther west than 97%.
  • 🎯1,293 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 94999 and you would come out at 38.27°S, 57.34°E — 996 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 50m of daylight. Shortest: 9h 30m.
🌙 The sky over 94999 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Land area

ZIP codes near 94999

ZIPCityDistance
94953 Petaluma, CA 2.7 mi
94955 Petaluma, CA 2.7 mi
94975 Petaluma, CA 2.7 mi
94951 Penngrove, CA 3.9 mi
94931 Cotati, CA 5.1 mi
94926 Rohnert Park, CA 5.5 mi
94927 Rohnert Park, CA 5.5 mi
94928 Rohnert Park, CA 5.7 mi
94954 Petaluma, CA 5.9 mi
94952 Petaluma, CA 6.0 mi

Find every ZIP code within 10 miles of 94999 →

Questions about this ZIP code

Where is ZIP code 94999?

94999 is in Petaluma, California, in Sonoma County, part of the Santa Rosa-Petaluma, CA metropolitan area. Its published point location is 38.2675, -122.6581.

What county is 94999 in?

94999 lies in Sonoma County.

What area code is 94999?

Petaluma uses area codes 707 and 369, from NANPA's telephone records.

What time zone is 94999 in?

94999 uses America/Los_Angeles.

What ZIP codes are near 94999?

The closest are 94953 (2.7 mi), 94955 (2.7 mi), 94975 (2.7 mi), 94951 (3.9 mi) and 94931 (5.1 mi).

Is 94999 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. “94999 ZIP Code — Petaluma, California (Sonoma County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94999

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/94999.json

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