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/06540

06540

ZIP 06540 is in New Haven, Connecticut, in New Haven County; area codes 203 and 475; Eastern time. New Haven has 28 ZIP codes in all.

Type
No street area
Time zone
America/New_York
County
New Haven
Metro area
none
Coordinates
41.2996, -72.9188

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 06511, whose figures describe that area — not this ZIP code.

☼ Live from 06540 — New Haven, CT

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Where 06540 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 06540
  • 🔢 Type 06540 into a pocket calculator and turn it upside down: OhSgO — not quite a word, sorry.
  • ➕ As a number, 6,540 = 2 × 2 × 3 × 5 × 109. Its digits add up to 15, a total 1,657 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100110001100
  • 🏠 Its numerical neighbours: 06538 (New Haven, CT, 5 mi away) and 06601 (Bridgeport, CT, 17 mi away).
  • 🔄 Backwards, 06540 becomes 04560, which is not a ZIP code at all.
  • 👥 27 other ZIP codes are made of exactly the same digits (04056, 04605, 04650, 05046, 05406, 05460, …). The farthest-flung twin is 64050 in Independence, MO, 1,141 miles away.
  • 🧭 Farther north than 69% of all ZIP codes, and farther east than 93%.
  • 🎯1,346 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 06540 and you would come out at 41.30°S, 107.08°E — 808 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 10m of daylight. Shortest: 9h 11m.
🌙 The sky over 06540 today
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Source: USGS.

Land area

ZIP codes near 06540

ZIPCityDistance
06510 New Haven, CT 0.6 mi
06501 New Haven, CT 0.8 mi
06502 New Haven, CT 0.8 mi
06503 New Haven, CT 0.8 mi
06505 New Haven, CT 0.8 mi
06506 New Haven, CT 0.8 mi
06507 New Haven, CT 0.8 mi
06508 New Haven, CT 0.8 mi
06509 New Haven, CT 0.8 mi
06520 New Haven, CT 0.8 mi

Find every ZIP code within 10 miles of 06540 →

Questions about this ZIP code

Where is ZIP code 06540?

06540 is in New Haven, Connecticut, in New Haven County. Its published point location is 41.2996, -72.9188.

What county is 06540 in?

06540 lies in New Haven County.

What area code is 06540?

New Haven uses area codes 203 and 475, from NANPA's telephone records.

What time zone is 06540 in?

06540 uses America/New_York.

What ZIP codes are near 06540?

The closest are 06510 (0.6 mi), 06501 (0.8 mi), 06502 (0.8 mi), 06503 (0.8 mi) and 06505 (0.8 mi).

Is 06540 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. “06540 ZIP Code — New Haven, Connecticut (New Haven County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/06540

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