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/01815

01815

ZIP 01815 is in Woburn, Massachusetts, in Middlesex County; area codes 781 and 339; Eastern time. Woburn has 4 ZIP codes; the others are 01801, 01813 and 01888.

Type
No street area
Time zone
America/New_York
County
Middlesex
Coordinates
42.4793, -71.1523

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 01801, whose figures describe that area — not this ZIP code.

☼ Live from 01815 — Woburn, MA

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Where 01815 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 01815
  • 🔢 Type 01815 into a pocket calculator and turn it upside down: SIBIO — not quite a word, sorry.
  • ➕ As a number, 1,815 = 3 × 5 × 11 × 11. Its digits add up to 15, a total 1,657 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11100010111
  • 🏠 Its numerical neighbours: 01813 (Woburn, MA, 0 mi away) and 01821 (Billerica, MA, 7 mi away).
  • 🔄 Backwards, 01815 becomes 51810, which is not a ZIP code at all.
  • 👥 25 other ZIP codes are made of exactly the same digits (01518, 01581, 01851, 08511, 10158, 10185, …). The farthest-flung twin is 85011 in Phoenix, AZ, 2,291 miles away.
  • 🧭 Farther north than 79% of all ZIP codes, and farther east than 96%.
  • 🎯1,432 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 01815 and you would come out at 42.48°S, 108.85°E — 823 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 18m of daylight. Shortest: 9h 04m.
🌙 The sky over 01815 today
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Source: USGS.

Land area

ZIP codes near 01815

ZIPCityDistance
01813 Woburn, MA 0.0 mi
01888 Woburn, MA 0.0 mi
01801 Woburn, MA 0.7 mi
01890 Winchester, MA 1.9 mi
02180 Stoneham, MA 2.8 mi
01805 Burlington, MA 2.8 mi
01803 Burlington, MA 3.0 mi
02420 Lexington, MA 3.6 mi
02474 Arlington, MA 4.0 mi
02156 West Medford, MA 4.1 mi

Find every ZIP code within 10 miles of 01815 →

Questions about this ZIP code

Where is ZIP code 01815?

01815 is in Woburn, Massachusetts, in Middlesex County, part of the Boston-Cambridge-Newton, MA-NH metropolitan area. Its published point location is 42.4793, -71.1523.

What county is 01815 in?

01815 lies in Middlesex County.

What area code is 01815?

Woburn uses area codes 781 and 339, from NANPA's telephone records.

What time zone is 01815 in?

01815 uses America/New_York.

What ZIP codes are near 01815?

The closest are 01813 (0 mi), 01888 (0 mi), 01801 (0.7 mi), 01890 (1.9 mi) and 02180 (2.8 mi).

Is 01815 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. “01815 ZIP Code — Woburn, Massachusetts (Middlesex County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/01815

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curl https://zipcodes.pro/zip/01815.json

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