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/91729

91729

ZIP 91729 is in Rancho Cucamonga, California, in San Bernardino County; area codes 909 and 840; Pacific time. Rancho Cucamonga has 5 ZIP codes; the others are 91701, 91730, 91737 and 91739.

Type
No street area
Time zone
America/Los_Angeles
Coordinates
34.1064, -117.5931

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 91730, whose figures describe that area — not this ZIP code.

☼ Live from 91729 — Rancho Cucamonga, CA

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Where 91729 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 91729
  • 🔢 Type 91729 into a pocket calculator and turn it upside down: GZLIG — not quite a word, sorry.
  • ➕ As a number, 91,729 = 11 × 31 × 269. Its digits add up to 28, a total 1,520 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110011001010001
  • 🏠 Its numerical neighbours: 91724 (Covina, CA, 15 mi away) and 91730 (Rancho Cucamonga, CA, 1 mi away).
  • 🔄 Backwards, 91729 becomes 92719, which is not a ZIP code at all.
  • 👥 18 other ZIP codes are made of exactly the same digits (12979, 12997, 17929, 27199, 27919, 71929, …). The farthest-flung twin is 99721 in Anaktuvuk Pass, AK, 2,704 miles away.
  • 🧭 Farther south than 78% of all ZIP codes, and farther west than 90%.
  • 🎯1,119 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91729 and you would come out at 34.11°S, 62.41°E — 1,008 miles from Saint-Denis, Reunion, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 26m of daylight. Shortest: 9h 53m.
🌙 The sky over 91729 today
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🌋 Shake report
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Source: USGS.

Business and tax activity

Business establishments33This ZIP33
Employees348This ZIP348
Annual payroll$19,568,000This ZIP$19,568,000

Land area

ZIP codes near 91729

ZIPCityDistance
91730 Rancho Cucamonga, CA 0.8 mi
91701 Rancho Cucamonga, CA 2.2 mi
91764 Ontario, CA 2.3 mi
91743 Guasti, CA 2.9 mi
91737 Rancho Cucamonga, CA 3.5 mi
91785 Upland, CA 3.8 mi
91786 Upland, CA 3.9 mi
91784 Upland, CA 4.3 mi
91758 Ontario, CA 4.5 mi
91761 Ontario, CA 4.9 mi

Find every ZIP code within 10 miles of 91729 →

Questions about this ZIP code

Where is ZIP code 91729?

91729 is in Rancho Cucamonga, California, in San Bernardino County, part of the Riverside-San Bernardino-Ontario, CA metropolitan area. Its published point location is 34.1064, -117.5931.

What county is 91729 in?

91729 lies in San Bernardino County.

What area code is 91729?

Rancho Cucamonga uses area codes 909 and 840, from NANPA's telephone records.

What time zone is 91729 in?

91729 uses America/Los_Angeles.

What ZIP codes are near 91729?

The closest are 91730 (0.8 mi), 91701 (2.2 mi), 91764 (2.3 mi), 91743 (2.9 mi) and 91737 (3.5 mi).

Is 91729 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. “91729 ZIP Code — Rancho Cucamonga, California (San Bernardino County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91729

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/91729.json

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