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/08644

08644

ZIP 08644 is in Trenton, New Jersey, in Mercer County; area codes 609 and 640; Eastern time. Trenton has 27 ZIP codes in all.

Type
No street area
Time zone
America/New_York
County
Mercer
Coordinates
40.2171, -74.7429

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 08609, whose figures describe that area — not this ZIP code.

☼ Live from 08644 — Trenton, NJ

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 08644 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 08644
  • 🔢 Type 08644 into a pocket calculator and turn it upside down: hhgBO — not quite a word, sorry.
  • ➕ As a number, 8,644 = 2 × 2 × 2161. Its digits add up to 22, a total 2,607 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10000111000100
  • 🏠 Its numerical neighbours: 08641 (Joint Base Mdl, NJ, 15 mi away) and 08645 (Trenton, NJ, 5 mi away).
  • 🔄 Backwards, 08644 becomes 44680 — and that is a real ZIP code: Strasburg, OH, 359 miles away.
  • 👥 39 other ZIP codes are made of exactly the same digits (04468, 04648, 04684, 04864, 06484, 40468, …). The farthest-flung twin is 86440 in Mohave Valley, AZ, 2,192 miles away.
  • 🧭 Farther north than 58% of all ZIP codes, and farther east than 88%.
  • 🎯1,258 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 08644 and you would come out at 40.22°S, 105.26°E — 821 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 02m of daylight. Shortest: 9h 18m.
🌙 The sky over 08644 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Land area

ZIP codes near 08644

ZIPCityDistance
08609 Trenton, NJ 0.6 mi
08629 Trenton, NJ 0.7 mi
08608 Trenton, NJ 1.3 mi
08610 Trenton, NJ 2.2 mi
08611 Trenton, NJ 2.3 mi
08638 Trenton, NJ 2.8 mi
08619 Trenton, NJ 3.0 mi
08618 Trenton, NJ 3.3 mi
08690 Trenton, NJ 4.4 mi
08543 Princeton, NJ 4.7 mi

Find every ZIP code within 10 miles of 08644 →

Questions about this ZIP code

Where is ZIP code 08644?

08644 is in Trenton, New Jersey, in Mercer County, part of the Trenton-Princeton, NJ metropolitan area. Its published point location is 40.2171, -74.7429.

What county is 08644 in?

08644 lies in Mercer County.

What area code is 08644?

Trenton uses area codes 609 and 640, from NANPA's telephone records.

What time zone is 08644 in?

08644 uses America/New_York.

What ZIP codes are near 08644?

The closest are 08609 (0.6 mi), 08629 (0.7 mi), 08608 (1.3 mi), 08610 (2.2 mi) and 08611 (2.3 mi).

Is 08644 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.

Download or cite

Cite this page

zipcodes.pro. “08644 ZIP Code — Trenton, New Jersey (Mercer County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/08644

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/08644.json

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