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/02238

02238

ZIP 02238 is in Cambridge, Massachusetts, in Middlesex County; area codes 617 and 857; Eastern time. Cambridge has 6 ZIP codes; the others are 02138, 02139, 02140, 02141 and 02142.

Type
No street area
Time zone
America/New_York
County
Middlesex
Coordinates
42.3751, -71.1056

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 02139, whose figures describe that area — not this ZIP code.

☼ Live from 02238 — Cambridge, MA

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Where 02238 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 02238
  • 🔢 Type 02238 into a pocket calculator and turn it upside down: BEZZO — not quite a word, sorry.
  • ➕ As a number, 2,238 = 2 × 3 × 373. Its digits add up to 15, a total 1,657 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100010111110
  • 🏠 Its numerical neighbours: 02222 (Boston, MA, 2 mi away) and 02241 (Boston, MA, 3 mi away).
  • 🔄 Backwards, 02238 becomes 83220 — and that is a real ZIP code: Bern, ID, 2,037 miles away.
  • 👥 32 other ZIP codes are made of exactly the same digits (02283, 02382, 02823, 02832, 03282, 03822, …). The farthest-flung twin is 83202 in Pocatello, ID, 2,075 miles away.
  • 🧭 Farther north than 78% of all ZIP codes, and farther east than 96%.
  • 🎯1,435 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 02238 and you would come out at 42.38°S, 108.89°E — 815 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 17m of daylight. Shortest: 9h 04m.
🌙 The sky over 02238 today
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🌋 Shake report
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Source: USGS.

Business and tax activity

Business establishments17This ZIP17
Employees2,153This ZIP2,153
Annual payroll$146,384,000This ZIP$146,384,000

Land area

ZIP codes near 02238

ZIPCityDistance
02143 Somerville, MA 0.6 mi
02139 Cambridge, MA 0.9 mi
02163 Boston, MA 1.1 mi
02141 Cambridge, MA 1.2 mi
02145 Somerville, MA 1.4 mi
02142 Cambridge, MA 1.5 mi
02138 Cambridge, MA 1.5 mi
02134 Allston, MA 1.7 mi
02140 Cambridge, MA 1.9 mi
02215 Boston, MA 1.9 mi

Find every ZIP code within 10 miles of 02238 →

Questions about this ZIP code

Where is ZIP code 02238?

02238 is in Cambridge, Massachusetts, in Middlesex County, part of the Boston-Cambridge-Newton, MA-NH metropolitan area. Its published point location is 42.3751, -71.1056.

What county is 02238 in?

02238 lies in Middlesex County.

What area code is 02238?

Cambridge uses area codes 617 and 857, from NANPA's telephone records.

What time zone is 02238 in?

02238 uses America/New_York.

What ZIP codes are near 02238?

The closest are 02143 (0.6 mi), 02139 (0.9 mi), 02163 (1.1 mi), 02141 (1.2 mi) and 02145 (1.4 mi).

Is 02238 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. “02238 ZIP Code — Cambridge, Massachusetts (Middlesex County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/02238

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/02238.json

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