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/06456

06456

ZIP 06456 is Middle Haddam, Connecticut, in Middlesex County; area codes 860 and 959; Eastern time.

Type
Standard
Time zone
America/New_York
County
Middlesex
Metro area
none
Population
281
Coordinates
41.5397, -72.5483
☼ Live from 06456 — Middle Haddam, CT

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Local time: —

Where 06456 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 06456
  • 🔢 Type 06456 into a pocket calculator and turn it upside down: gShgO — not quite a word, sorry.
  • ➕ As a number, 6,456 = 2 × 2 × 2 × 3 × 269. Its digits add up to 21, a total 2,594 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100100111000
  • 🏠 Its numerical neighbours: 06455 (Middlefield, CT, 9 mi away) and 06457 (Middletown, CT, 6 mi away).
  • 🔄 Backwards, 06456 becomes 65460, which is not a ZIP code at all.
  • 👥 28 other ZIP codes are made of exactly the same digits (05466, 05664, 45066, 45660, 46056, 46065, …). The farthest-flung twin is 66540 in Soldier, KS, 1,235 miles away.
  • 🧭 Farther north than 71% of all ZIP codes, and farther east than 94%.
  • 🎯1,364 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 06456 and you would come out at 41.54°S, 107.45°E — 809 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 11m of daylight. Shortest: 9h 10m.
  • 📏 At 1.3 square miles of land, 06456 is bigger than 9% of ZIP codes — room for about 1.0 Central Parks.
🌙 The sky over 06456 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population281This ZIP281
Households166This ZIP166
Housing units173This ZIP173
Median age65.0This ZIP65.0Connecticut41.1US 38.9
Median household income$128,542This ZIP$128,542Connecticut$95,781US $80,734
Median home value$434,000This ZIP$434,000Connecticut$366,900US $332,700
Bachelor's degree or higher59.0%This ZIP59.0%
Mean commute24.8 minThis ZIP24.8 min
Population density211.6 / sq miThis ZIP211.6 / sq mi

Business and tax activity

Business establishments5This ZIP5
Employees12This ZIP12
Annual payroll$204,000This ZIP$204,000

Land area

Land area1.33 sq miThis ZIP1.33 sq mi
Water area0.40 sq miThis ZIP0.40 sq mi

ZIP codes near 06456

ZIPCityDistance
06414 Cobalt, CT 2.6 mi
06424 East Hampton, CT 2.7 mi
06480 Portland, CT 4.6 mi
06441 Higganum, CT 5.4 mi
06469 Moodus, CT 5.6 mi
06457 Middletown, CT 5.7 mi
06459 Middletown, CT 5.9 mi
06438 Haddam, CT 6.5 mi
06481 Rockfall, CT 7.7 mi
06416 Cromwell, CT 7.9 mi

Find every ZIP code within 10 miles of 06456 →

Questions about this ZIP code

Where is ZIP code 06456?

06456 is in Middle Haddam, Connecticut, in Middlesex County. Its published point location is 41.5397, -72.5483.

What county is 06456 in?

06456 lies in Middlesex County.

What area code is 06456?

Middle Haddam uses area codes 860 and 959, from NANPA's telephone records.

What time zone is 06456 in?

06456 uses America/New_York.

How many people live in 06456?

About 281 people live in ZIP code 06456, in 166 households, at 211.6 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 06456?

$128,542 a year, against $95,781 across Connecticut.

What ZIP codes are near 06456?

The closest are 06414 (2.6 mi), 06424 (2.7 mi), 06480 (4.6 mi), 06441 (5.4 mi) and 06469 (5.6 mi).

Is 06456 a PO Box ZIP code?

06456 is a standard ZIP code. A normal ZIP code with street delivery.

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zipcodes.pro. “06456 ZIP Code — Middle Haddam, Connecticut (Middlesex County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/06456

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