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/21843

21843

ZIP 21843 is in Ocean City, Maryland, in Worcester County; area codes 410, 443 and 667; Eastern time. Ocean City has 2 ZIP codes; the other is 21842.

Type
No street area
Time zone
America/New_York
County
Worcester
Metro area
Ocean Pines, MD
Coordinates
38.3365, -75.0849

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 21842, whose figures describe that area — not this ZIP code.

☼ Live from 21843 — Ocean City, MD

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Local time: —

Where 21843 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 21843
  • 🔢 Type 21843 into a pocket calculator and turn it upside down: EhBIZ — not quite a word, sorry.
  • ➕ As a number, 21,843 = 3 × 3 × 3 × 809. Its digits add up to 18, a total 2,332 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101010101010011
  • 🏠 Its numerical neighbours: 21842 (Ocean City, MD, 2 mi away) and 21849 (Parsonsburg, MD, 20 mi away).
  • 🔄 Backwards, 21843 becomes 34812, which is not a ZIP code at all.
  • 👥 55 other ZIP codes are made of exactly the same digits (12438, 12483, 12834, 12843, 13428, 13482, …). The farthest-flung twin is 83214 in Arimo, ID, 1,963 miles away.
  • 🧭 Farther south than 56% of all ZIP codes, and farther east than 87%.
  • 🎯1,261 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21843 and you would come out at 38.34°S, 104.92°E — 759 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 50m of daylight. Shortest: 9h 29m.
🌙 The sky over 21843 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments22This ZIP22
Employees137This ZIP137
Annual payroll$8,066,000This ZIP$8,066,000

Land area

ZIP codes near 21843

ZIPCityDistance
21842 Ocean City, MD 1.8 mi
21811 Berlin, MD 7.5 mi
21813 Bishopville, MD 7.9 mi
21862 Showell, MD 8.1 mi
19944 Fenwick Island, DE 9.9 mi
19975 Selbyville, DE 10.3 mi
21872 Whaleyville, MD 12.8 mi
21841 Newark, MD 13.2 mi
19945 Frankford, DE 13.6 mi
19967 Millville, DE 14.2 mi

Find every ZIP code within 10 miles of 21843 →

Questions about this ZIP code

Where is ZIP code 21843?

21843 is in Ocean City, Maryland, in Worcester County, part of the Ocean Pines, MD micropolitan area. Its published point location is 38.3365, -75.0849.

What county is 21843 in?

21843 lies in Worcester County.

What area code is 21843?

Ocean City uses area codes 410, 443 and 667, from NANPA's telephone records.

What time zone is 21843 in?

21843 uses America/New_York.

What ZIP codes are near 21843?

The closest are 21842 (1.8 mi), 21811 (7.5 mi), 21813 (7.9 mi), 21862 (8.1 mi) and 19944 (9.9 mi).

Is 21843 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. “21843 ZIP Code — Ocean City, Maryland (Worcester County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21843

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/21843.json

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