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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/33583

33583

ZIP 33583 is in Seffner, Florida, in Hillsborough County; area codes 813 and 656; Eastern time. Seffner has 2 ZIP codes; the other is 33584.

Type
No street area
Time zone
America/New_York
County
Hillsborough
Coordinates
27.8720, -82.4388

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.

☼ Live from 33583 — Seffner, FL

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Where 33583 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 33583
  • 🔢 Type 33583 into a pocket calculator and turn it upside down: EBSEE — not quite a word, sorry.
  • ➕ As a number, 33,583 = 11 × 43 × 71. Its digits add up to 22, a total 2,607 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1000001100101111
  • 🏠 Its numerical neighbours: 33579 (Riverview, FL, 11 mi away) and 33584 (Seffner, FL, 13 mi away).
  • 🔄 Backwards, 33583 becomes 38533, which is not a ZIP code at all.
  • 👥 7 other ZIP codes are made of exactly the same digits (33538, 33835, 33853, 83335, 83353, 83533, …). The farthest-flung twin is 83533 in Greencreek, ID, 2,225 miles away.
  • 🧭 Farther south than 96% of all ZIP codes, and farther east than 65%.
  • 🎯1,237 miles southeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 33583 and you would come out at 27.87°S, 97.56°E — 1,087 miles from West Island, Cocos Islands, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 55m of daylight. Shortest: 10h 22m.
🌙 The sky over 33583 today
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Source: USGS.

Business and tax activity

Business establishments11This ZIP11
Employees140This ZIP140
Annual payroll$8,724,000This ZIP$8,724,000

Land area

ZIP codes near 33583

ZIPCityDistance
33568 Riverview, FL 0.0 mi
33630 Tampa, FL 0.0 mi
33631 Tampa, FL 0.0 mi
33633 Tampa, FL 0.0 mi
33650 Tampa, FL 0.0 mi
33660 Tampa, FL 0.0 mi
33661 Tampa, FL 0.0 mi
33662 Tampa, FL 0.0 mi
33663 Tampa, FL 0.0 mi
33664 Tampa, FL 0.0 mi

Find every ZIP code within 10 miles of 33583 →

Questions about this ZIP code

Where is ZIP code 33583?

33583 is in Seffner, Florida, in Hillsborough County, part of the Tampa-St. Petersburg-Clearwater, FL metropolitan area. Its published point location is 27.8720, -82.4388.

What county is 33583 in?

33583 lies in Hillsborough County.

What area code is 33583?

Seffner uses area codes 813 and 656, from NANPA's telephone records.

What time zone is 33583 in?

33583 uses America/New_York.

What ZIP codes are near 33583?

The closest are 33568 (0 mi), 33630 (0 mi), 33631 (0 mi), 33633 (0 mi) and 33650 (0 mi).

Is 33583 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. “33583 ZIP Code — Seffner, Florida (Hillsborough County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/33583

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curl https://zipcodes.pro/zip/33583.json

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