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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/40621

40621

ZIP 40621 is in Frankfort, Kentucky, in Franklin County; area code 502; Eastern time. Frankfort has 9 ZIP codes in all.

Type
No street area
Time zone
America/New_York
County
Franklin
Metro area
Frankfort, KY
Coordinates
38.2009, -84.8733

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 40601, whose figures describe that area — not this ZIP code.

☼ Live from 40621 — Frankfort, KY

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Where 40621 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 40621
  • 🔢 Type 40621 into a pocket calculator and turn it upside down: IZgOh — not quite a word, sorry.
  • ➕ As a number, 40,621 = 7 × 7 × 829. Its digits add up to 13, a total 1,179 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1001111010101101
  • 🏠 Its numerical neighbours: 40620 (Frankfort, KY, 2 mi away) and 40622 (Frankfort, KY, 0 mi away).
  • 🔄 Backwards, 40621 becomes 12604 — and that is a real ZIP code: Poughkeepsie, NY, 629 miles away.
  • 👥 66 other ZIP codes are made of exactly the same digits (01264, 01462, 02461, 02641, 04216, 04261, …). The farthest-flung twin is 04612 in Bernard, ME, 951 miles away.
  • 🧭 Farther south than 57% of all ZIP codes, and farther east than 57%.
  • 🎯744 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 40621 and you would come out at 38.20°S, 95.13°E — 1,246 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 49m of daylight. Shortest: 9h 30m.
🌙 The sky over 40621 today
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Source: USGS.

Land area

ZIP codes near 40621

ZIPCityDistance
40622 Frankfort, KY 0.0 mi
40602 Frankfort, KY 2.3 mi
40603 Frankfort, KY 2.3 mi
40604 Frankfort, KY 2.3 mi
40618 Frankfort, KY 2.3 mi
40619 Frankfort, KY 2.3 mi
40620 Frankfort, KY 2.3 mi
40601 Frankfort, KY 2.4 mi
40347 Midway, KY 8.4 mi
40003 Bagdad, KY 10.6 mi

Find every ZIP code within 10 miles of 40621 →

Questions about this ZIP code

Where is ZIP code 40621?

40621 is in Frankfort, Kentucky, in Franklin County, part of the Frankfort, KY micropolitan area. Its published point location is 38.2009, -84.8733.

What county is 40621 in?

40621 lies in Franklin County.

What area code is 40621?

Frankfort uses area code 502, from NANPA's telephone records.

What time zone is 40621 in?

40621 uses America/New_York.

What ZIP codes are near 40621?

The closest are 40622 (0 mi), 40602 (2.3 mi), 40603 (2.3 mi), 40604 (2.3 mi) and 40618 (2.3 mi).

Is 40621 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. “40621 ZIP Code — Frankfort, Kentucky (Franklin County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/40621

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/40621.json

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