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/04420

04420

ZIP 04420 is in Castine, Maine, in Hancock County; area code 207; Eastern time. Castine has 2 ZIP codes; the other is 04421.

Type
No street area
Time zone
America/New_York
County
Hancock
Metro area
none
Coordinates
44.4130, -68.7980

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 04421, whose figures describe that area — not this ZIP code.

☼ Live from 04420 — Castine, ME

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Where 04420 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 04420
  • 🔢 Type 04420 into a pocket calculator and turn it upside down: OZhhO — not quite a word, sorry.
  • ➕ As a number, 4,420 = 2 × 2 × 5 × 13 × 17. Its digits add up to 10, a total 513 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1000101000100
  • 🏠 Its numerical neighbours: 04419 (Carmel, ME, 29 mi away) and 04421 (Castine, ME, 1 mi away).
  • 🔄 Backwards, 04420 becomes 02440, which is not a ZIP code at all.
  • 👥 13 other ZIP codes are made of exactly the same digits (02044, 04024, 04042, 04240, 04402, 20044, …). The farthest-flung twin is 42040 in Farmington, KY, 1,163 miles away.
  • 🧭 Farther north than 89% of all ZIP codes, and farther east than 98%.
  • 🎯1,550 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 04420 and you would come out at 44.41°S, 111.20°E — 897 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 32m of daylight. Shortest: 8h 50m.
🌙 The sky over 04420 today
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Source: USGS.

Business and tax activity

Business establishments5This ZIP5
Employees47This ZIP47
Annual payroll$2,649,000This ZIP$2,649,000

Land area

ZIP codes near 04420

ZIPCityDistance
04421 Castine, ME 0.9 mi
04617 Brooksville, ME 4.8 mi
04642 Harborside, ME 5.7 mi
04476 Penobscot, ME 6.6 mi
04972 Sandy Point, ME 7.1 mi
04981 Stockton Springs, ME 7.3 mi
04974 Searsport, ME 7.6 mi
04650 Little Deer Isle, ME 9.0 mi
04676 Sedgwick, ME 9.3 mi
04848 Islesboro, ME 9.8 mi

Find every ZIP code within 10 miles of 04420 →

Questions about this ZIP code

Where is ZIP code 04420?

04420 is in Castine, Maine, in Hancock County. Its published point location is 44.4130, -68.7980.

What county is 04420 in?

04420 lies in Hancock County.

What area code is 04420?

Castine uses area code 207, from NANPA's telephone records.

What time zone is 04420 in?

04420 uses America/New_York.

What ZIP codes are near 04420?

The closest are 04421 (0.9 mi), 04617 (4.8 mi), 04642 (5.7 mi), 04476 (6.6 mi) and 04972 (7.1 mi).

Is 04420 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. “04420 ZIP Code — Castine, Maine (Hancock County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/04420

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/04420.json

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