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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/00940

00940

ZIP 00940 is in San Juan, Puerto Rico, in San Juan Municipio; area code 787; Atlantic time. San Juan has 37 ZIP codes in all.

Type
No street area
Time zone
America/Puerto_Rico
County
San Juan
Coordinates
18.4663, -66.1057

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 00901, whose figures describe that area — not this ZIP code.

☼ Live from 00940 — San Juan, PR

Weather right now

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Local time: —

Where 00940 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 00940
  • 🔢 Type 00940 into a pocket calculator and turn it upside down: OhGOO — not quite a word, sorry.
  • ➕ As a number, 940 = 2 × 2 × 5 × 47. Its digits add up to 13, a total 1,179 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1110101100
  • 🏠 Its numerical neighbours: 00939 (San Juan, PR, 0 mi away) and 00949 (Toa Baja, PR, 9 mi away).
  • 🔄 Backwards, 00940 becomes 04900, which is not a ZIP code at all.
  • 👥 5 other ZIP codes are made of exactly the same digits (04009, 04090, 40009, 90004, 90040). The farthest-flung twin is 90004 in Los Angeles, CA, 3,370 miles away.
  • 🧭 Farther south than 99% of all ZIP codes, and farther east than 98%.
  • 🎯2,430 miles southeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 00940 and you would come out at 18.47°S, 113.89°E — 684 miles from Denpasar, Indonesia, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 14m of daylight. Shortest: 11h 01m.
🌙 The sky over 00940 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

Land area

ZIP codes near 00940

ZIPCityDistance
00902 San Juan, PR 0.0 mi
00908 San Juan, PR 0.0 mi
00910 San Juan, PR 0.0 mi
00914 San Juan, PR 0.0 mi
00916 San Juan, PR 0.0 mi
00919 San Juan, PR 0.0 mi
00922 San Juan, PR 0.0 mi
00928 San Juan, PR 0.0 mi
00929 San Juan, PR 0.0 mi
00930 San Juan, PR 0.0 mi

Find every ZIP code within 10 miles of 00940 →

Questions about this ZIP code

Where is ZIP code 00940?

00940 is in San Juan, Puerto Rico, in San Juan Municipio, part of the San Juan-Bayamón-Caguas, PR metropolitan area. Its published point location is 18.4663, -66.1057.

What county is 00940 in?

00940 lies in San Juan Municipio.

What area code is 00940?

San Juan uses area code 787, from NANPA's telephone records.

What time zone is 00940 in?

00940 uses America/Puerto_Rico.

What ZIP codes are near 00940?

The closest are 00902 (0 mi), 00908 (0 mi), 00910 (0 mi), 00914 (0 mi) and 00916 (0 mi).

Is 00940 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. “00940 ZIP Code — San Juan, Puerto Rico (San Juan Municipio).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/00940

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/00940.json

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