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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/92521

92521

ZIP 92521 is in Riverside, California, in Riverside County; area code 951; Pacific time. Riverside has 17 ZIP codes in all.

Type
Standard
Time zone
America/Los_Angeles
County
Riverside
Population
0
Coordinates
33.9671, -117.3264
☼ Live from 92521 — Riverside, CA

Weather right now

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Local time: —

Where 92521 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 92521
  • 🔢 Type 92521 into a pocket calculator and turn it upside down: IZSZG — not quite a word, sorry.
  • ➕ As a number, 92,521 = 11 × 13 × 647. Its digits add up to 19, a total 2,454 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110100101101001
  • 🏠 Its numerical neighbours: 92519 (Riverside, CA, 4 mi away) and 92522 (Riverside, CA, 4 mi away).
  • 🔄 Backwards, 92521 becomes 12529 — and that is a real ZIP code: Hillsdale, NY, 2,420 miles away.
  • 👥 24 other ZIP codes are made of exactly the same digits (12529, 12592, 12952, 15229, 15922, 19522, …). The farthest-flung twin is 12592 in Wassaic, NY, 2,421 miles away.
  • 🧭 Farther south than 79% of all ZIP codes, and farther west than 90%.
  • 🎯1,110 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 92521 and you would come out at 33.97°S, 62.67°E — 1,005 miles from Port Louis, Mauritius, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 25m of daylight. Shortest: 9h 53m.
  • 📏 At 0.715 square miles of land, 92521 is bigger than 7% of ZIP codes — about 346 football fields.
🌙 The sky over 92521 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population0
Households0
Housing units0
Population density0.0 / sq mi

Business and tax activity

Business establishments11This ZIP11
Employees106This ZIP106
Annual payroll$2,320,000This ZIP$2,320,000

Land area

Land area0.72 sq miThis ZIP0.72 sq mi
Water area0.00 sq miThis ZIP0.00 sq mi

Other place names in 92521

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 92521

ZIPCityDistance
92507 Riverside, CA 2.0 mi
92506 Riverside, CA 3.2 mi
92501 Riverside, CA 3.4 mi
92557 Moreno Valley, CA 3.9 mi
92502 Riverside, CA 4.1 mi
92513 Riverside, CA 4.1 mi
92514 Riverside, CA 4.1 mi
92515 Riverside, CA 4.1 mi
92516 Riverside, CA 4.1 mi
92517 Riverside, CA 4.1 mi

Find every ZIP code within 10 miles of 92521 →

Questions about this ZIP code

Where is ZIP code 92521?

92521 is in Riverside, California, in Riverside County, part of the Riverside-San Bernardino-Ontario, CA metropolitan area. Its published point location is 33.9671, -117.3264.

What county is 92521 in?

92521 lies in Riverside County.

What area code is 92521?

Riverside uses area code 951, from NANPA's telephone records.

What time zone is 92521 in?

92521 uses America/Los_Angeles.

How many people live in 92521?

About 0 people live in ZIP code 92521. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What ZIP codes are near 92521?

The closest are 92507 (2 mi), 92506 (3.2 mi), 92501 (3.4 mi), 92557 (3.9 mi) and 92502 (4.1 mi).

Is 92521 a PO Box ZIP code?

92521 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “92521 ZIP Code — Riverside, California (Riverside County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/92521

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