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/01601

01601

ZIP 01601 is in Worcester, Massachusetts, in Worcester County; area codes 508 and 774; Eastern time. Worcester has 15 ZIP codes in all.

Type
No street area
Time zone
America/New_York
County
Worcester
Metro area
Worcester, MA
Coordinates
42.2626, -71.8023

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 01608, whose figures describe that area — not this ZIP code.

☼ Live from 01601 — Worcester, MA

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Where 01601 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 01601
  • 🔢 Type 01601 into a pocket calculator and turn it upside down: IOgIO — not quite a word, sorry.
  • ➕ 01601 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 8, a total 251 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11001000001
  • 🏠 Its numerical neighbours: 01590 (Sutton, MA, 9 mi away) and 01602 (Worcester, MA, 3 mi away).
  • 🔄 Backwards, 01601 becomes 10610 — and that is a real ZIP code: White Plains, NY, 127 miles away.
  • 👥 18 other ZIP codes are made of exactly the same digits (00611, 01061, 01106, 01610, 06011, 06101, …). The farthest-flung twin is 00611 in Angeles, PR, 1,683 miles away.
  • 🧭 Farther north than 77% of all ZIP codes, and farther east than 95%.
  • 🎯1,400 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 01601 and you would come out at 42.26°S, 108.20°E — 827 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 16m of daylight. Shortest: 9h 05m.
🌙 The sky over 01601 today
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🌋 Shake report
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Source: USGS.

Business and tax activity

Business establishments14This ZIP14
Employees741This ZIP741
Annual payroll$48,134,000This ZIP$48,134,000

Land area

ZIP codes near 01601

ZIPCityDistance
01614 Worcester, MA 0.0 mi
01615 Worcester, MA 0.0 mi
01608 Worcester, MA 0.1 mi
01610 Worcester, MA 1.1 mi
01604 Worcester, MA 1.9 mi
01605 Worcester, MA 2.0 mi
01609 Worcester, MA 2.1 mi
01613 Worcester, MA 2.1 mi
01603 Worcester, MA 2.5 mi
01602 Worcester, MA 2.5 mi

Find every ZIP code within 10 miles of 01601 →

Questions about this ZIP code

Where is ZIP code 01601?

01601 is in Worcester, Massachusetts, in Worcester County, part of the Worcester, MA metropolitan area. Its published point location is 42.2626, -71.8023.

What county is 01601 in?

01601 lies in Worcester County.

What area code is 01601?

Worcester uses area codes 508 and 774, from NANPA's telephone records.

What time zone is 01601 in?

01601 uses America/New_York.

What ZIP codes are near 01601?

The closest are 01614 (0 mi), 01615 (0 mi), 01608 (0.1 mi), 01610 (1.1 mi) and 01604 (1.9 mi).

Is 01601 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. “01601 ZIP Code — Worcester, Massachusetts (Worcester County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/01601

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/01601.json

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