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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/06123

06123

ZIP 06123 is in Hartford, Connecticut, in Hartford County; area codes 860 and 959; Eastern time. Hartford has 36 ZIP codes in all.

Type
No street area
Time zone
America/New_York
County
Hartford
Metro area
none
Coordinates
41.7637, -72.6851

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 06106, whose figures describe that area — not this ZIP code.

☼ Live from 06123 — Hartford, CT

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Where 06123 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 06123
  • 🔢 Type 06123 into a pocket calculator and turn it upside down: EZIgO — not quite a word, sorry.
  • ➕ As a number, 6,123 = 3 × 13 × 157. Its digits add up to 12, a total 940 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1011111101011
  • 🏠 Its numerical neighbours: 06120 (Hartford, CT, 2 mi away) and 06126 (Hartford, CT, 0 mi away).
  • 🔄 Backwards, 06123 becomes 32160 — and that is a real ZIP code: Lake Geneva, FL, 978 miles away.
  • 👥 62 other ZIP codes are made of exactly the same digits (01236, 01263, 02136, 02163, 02361, 02631, …). The farthest-flung twin is 32610 in Gainesville, FL, 996 miles away.
  • 🧭 Farther north than 73% of all ZIP codes, and farther east than 93%.
  • 🎯1,356 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 06123 and you would come out at 41.76°S, 107.31°E — 825 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 13m of daylight. Shortest: 9h 08m.
🌙 The sky over 06123 today
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Source: USGS.

Land area

ZIP codes near 06123

ZIPCityDistance
06126 Hartford, CT 0.0 mi
06132 Hartford, CT 0.0 mi
06134 Hartford, CT 0.0 mi
06152 Hartford, CT 0.0 mi
06167 Hartford, CT 0.0 mi
06155 Hartford, CT 0.4 mi
06156 Hartford, CT 0.4 mi
06115 Hartford, CT 0.4 mi
06160 Hartford, CT 0.5 mi
06154 Hartford, CT 0.5 mi

Find every ZIP code within 10 miles of 06123 →

Questions about this ZIP code

Where is ZIP code 06123?

06123 is in Hartford, Connecticut, in Hartford County. Its published point location is 41.7637, -72.6851.

What county is 06123 in?

06123 lies in Hartford County.

What area code is 06123?

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

What time zone is 06123 in?

06123 uses America/New_York.

What ZIP codes are near 06123?

The closest are 06126 (0 mi), 06132 (0 mi), 06134 (0 mi), 06152 (0 mi) and 06167 (0 mi).

Is 06123 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. “06123 ZIP Code — Hartford, Connecticut (Hartford County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/06123

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