21528

ZIP 21528 is Eckhart Mines, Maryland, in Allegany County; area codes 240 and 301; Eastern time.

Type: No street area
Time zone: America/New_York
County: Allegany
Metro area: Cumberland, MD-WV
Coordinates: 39.6528, -78.9014

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 21532, whose figures describe that area — not this ZIP code.

☼ Live from 21528 — Eckhart Mines, MD

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Where 21528 is

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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 21528

🔢 Type 21528 into a pocket calculator and turn it upside down: BZSIZ — not quite a word, sorry.
➕ As a number, 21,528 = 2 × 2 × 2 × 3 × 3 × 13 × 23. Its digits add up to 18, a total 2,332 other ZIP codes share.
💾In binary, the way a computer stores it: 101010000011000
🏠 Its numerical neighbours: 21524 (Corriganville, MD, 6 mi away) and 21529 (Ellerslie, MD, 8 mi away).
🔄 Backwards, 21528 becomes 82512 — and that is a real ZIP code: Crowheart, WY, 1,582 miles away.
👥 31 other ZIP codes are made of exactly the same digits (12528, 12582, 12852, 15228, 15282, 15822, …). The farthest-flung twin is 85122 in Casa Grande, AZ, 1,876 miles away.
🧭 Farther north than 53% of all ZIP codes, and farther east than 77%.
🎯1,043 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
🌏 Dig straight through the Earth from 21528 and you would come out at 39.65°S, 101.10°E — 982 miles from Perth, Australia, the nearest big city to that spot.
☀Longest day of the year: 14h 59m of daylight. Shortest: 9h 22m.

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Land area

ZIP codes near 21528

ZIP	City	Distance
`21543`	Midlothian, MD	3.2 mi
`21545`	Mount Savage, MD	4.3 mi
`21532`	Frostburg, MD	4.4 mi
`21542`	Midland, MD	5.0 mi
`21505`	Cumberland, MD	5.1 mi
`15564`	Wellersburg, PA	6.1 mi
`21556`	Pinto, MD	6.3 mi
`21524`	Corriganville, MD	6.5 mi
`21539`	Lonaconing, MD	7.0 mi
`21501`	Cumberland, MD	7.4 mi

Find every ZIP code within 10 miles of 21528 →

Questions about this ZIP code

Where is ZIP code 21528?

21528 is in Eckhart Mines, Maryland, in Allegany County, part of the Cumberland, MD-WV micropolitan area. Its published point location is 39.6528, -78.9014.

What county is 21528 in?

21528 lies in Allegany County.

What area code is 21528?

Eckhart Mines uses area codes 240 and 301, from NANPA's telephone records.

What time zone is 21528 in?

21528 uses America/New_York.

What ZIP codes are near 21528?

The closest are 21543 (3.2 mi), 21545 (4.3 mi), 21532 (4.4 mi), 21542 (5 mi) and 21505 (5.1 mi).

Is 21528 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. “21528 ZIP Code — Eckhart Mines, Maryland (Allegany County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21528

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/21528.json

Underlying data is public domain or openly licensed — sources, vintages and licences.