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/94666

94666

ZIP 94666 is in Oakland, California, in Alameda County; area codes 510 and 341; Pacific time. Oakland has 26 ZIP codes in all.

Type
No street area
Time zone
America/Los_Angeles
County
Alameda
Coordinates
37.8044, -122.2708

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 94612, whose figures describe that area — not this ZIP code.

☼ Live from 94666 — Oakland, CA

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Where 94666 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 94666
  • 🔢 Type 94666 into a pocket calculator and turn it upside down: ggghG — not quite a word, sorry.
  • ➕ As a number, 94,666 = 2 × 11 × 13 × 331. Its digits add up to 31, a total 799 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111000111001010
  • 🏠 Its numerical neighbours: 94662 (Emeryville, CA, 2 mi away) and 94701 (Berkeley, CA, 4 mi away).
  • 🔄 Backwards, 94666 becomes 66649, which is not a ZIP code at all.
  • 👥 3 other ZIP codes are made of exactly the same digits (49666, 66946, 66964). The farthest-flung twin is 49666 in Mayfield, MI, 1,949 miles away.
  • 🧭 Farther south than 59% of all ZIP codes, and farther west than 96%.
  • 🎯1,279 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 94666 and you would come out at 37.80°S, 57.73°E — 1,011 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 47m of daylight. Shortest: 9h 32m.
🌙 The sky over 94666 today
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Source: USGS.

Land area

ZIP codes near 94666

ZIPCityDistance
94604 Oakland, CA 0.0 mi
94623 Oakland, CA 0.0 mi
94624 Oakland, CA 0.0 mi
94649 Oakland, CA 0.0 mi
94659 Oakland, CA 0.0 mi
94660 Oakland, CA 0.0 mi
94661 Oakland, CA 0.0 mi
94617 Oakland, CA 0.2 mi
94612 Oakland, CA 0.3 mi
94615 Oakland, CA 1.6 mi

Find every ZIP code within 10 miles of 94666 →

Questions about this ZIP code

Where is ZIP code 94666?

94666 is in Oakland, California, in Alameda County, part of the San Francisco-Oakland-Fremont, CA metropolitan area. Its published point location is 37.8044, -122.2708.

What county is 94666 in?

94666 lies in Alameda County.

What area code is 94666?

Oakland uses area codes 510 and 341, from NANPA's telephone records.

What time zone is 94666 in?

94666 uses America/Los_Angeles.

What ZIP codes are near 94666?

The closest are 94604 (0 mi), 94623 (0 mi), 94624 (0 mi), 94649 (0 mi) and 94659 (0 mi).

Is 94666 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. “94666 ZIP Code — Oakland, California (Alameda County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94666

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curl https://zipcodes.pro/zip/94666.json

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