21018

ZIP 21018 is Benson, Maryland, in Harford County; area codes 443, 410 and 667; Eastern time.

Type: No street area
Time zone: America/New_York
County: Harford
Metro area: Baltimore-Columbia-Towson, MD
Coordinates: 39.5093, -76.3851

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 21047, whose figures describe that area — not this ZIP code.

☼ Live from 21018 — Benson, MD

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Where 21018 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 21018

🔢 Type 21018 into a pocket calculator and turn it upside down: BIOIZ — not quite a word, sorry.
➕ As a number, 21,018 = 2 × 3 × 31 × 113. Its digits add up to 12, a total 940 other ZIP codes share.
💾In binary, the way a computer stores it: 101001000011010
🏠 Its numerical neighbours: 21017 (Belcamp, MD, 8 mi away) and 21020 (Boring, MD, 22 mi away).
🔄 Backwards, 21018 becomes 81012 — and that is a real ZIP code: Pueblo, CO, 1,513 miles away.
👥 34 other ZIP codes are made of exactly the same digits (01128, 01812, 01821, 02118, 10128, 10281, …). The farthest-flung twin is 81120 in Antonito, CO, 1,624 miles away.
🧭 Farther north than 52% of all ZIP codes, and farther east than 84%.
🎯1,178 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
🌏 Dig straight through the Earth from 21018 and you would come out at 39.51°S, 103.61°E — 861 miles from Perth, Australia, the nearest big city to that spot.
☀Longest day of the year: 14h 58m of daylight. Shortest: 9h 22m.

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Land area

ZIP codes near 21018

ZIP	City	Distance
`21014`	Bel Air, MD	2.6 mi
`21047`	Fallston, MD	3.1 mi
`21087`	Kingsville, MD	4.4 mi
`21051`	Fork, MD	4.5 mi
`21085`	Joppa, MD	4.6 mi
`21082`	Hydes, MD	5.2 mi
`21050`	Forest Hill, MD	5.3 mi
`21015`	Bel Air, MD	5.5 mi
`21156`	Upper Falls, MD	5.6 mi
`21013`	Baldwin, MD	5.6 mi

Find every ZIP code within 10 miles of 21018 →

Questions about this ZIP code

Where is ZIP code 21018?

21018 is in Benson, Maryland, in Harford County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.5093, -76.3851.

What county is 21018 in?

21018 lies in Harford County.

What area code is 21018?

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

What time zone is 21018 in?

21018 uses America/New_York.

What ZIP codes are near 21018?

The closest are 21014 (2.6 mi), 21047 (3.1 mi), 21087 (4.4 mi), 21051 (4.5 mi) and 21085 (4.6 mi).

Is 21018 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. “21018 ZIP Code — Benson, Maryland (Harford County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21018

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/21018.json

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