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/29423

29423

ZIP 29423 is in Charleston, South Carolina, in Charleston County; area codes 843 and 854; Eastern time. Charleston has 16 ZIP codes in all.

Type
No street area
Time zone
America/New_York
County
Charleston
Coordinates
32.8488, -79.8577

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 29464, whose figures describe that area — not this ZIP code.

☼ Live from 29423 — Charleston, SC

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Where 29423 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 29423
  • 🔢 Type 29423 into a pocket calculator and turn it upside down: EZhGZ — not quite a word, sorry.
  • ➕ 29423 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 20, a total 2,586 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 111001011101111
  • 🏠 Its numerical neighbours: 29422 (Charleston, SC, 0 mi away) and 29424 (Charleston, SC, 6 mi away).
  • 🔄 Backwards, 29423 becomes 32492, which is not a ZIP code at all.
  • 👥 27 other ZIP codes are made of exactly the same digits (22943, 23249, 23294, 23429, 23924, 23942, …). The farthest-flung twin is 94232 in Sacramento, CA, 2,349 miles away.
  • 🧭 Farther south than 85% of all ZIP codes, and farther east than 74%.
  • 🎯1,145 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 29423 and you would come out at 32.85°S, 100.14°E — 918 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 19m of daylight. Shortest: 9h 59m.
🌙 The sky over 29423 today
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🌋 Shake report
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Source: USGS.

Business and tax activity

Business establishments9This ZIP9
Employees98This ZIP98
Annual payroll$4,236,000This ZIP$4,236,000

Land area

ZIP codes near 29423

ZIPCityDistance
29413 Charleston, SC 0.0 mi
29416 Charleston, SC 0.0 mi
29417 Charleston, SC 0.0 mi
29422 Charleston, SC 0.0 mi
29464 Mount Pleasant, SC 2.0 mi
29465 Mount Pleasant, SC 3.8 mi
29492 Charleston, SC 4.4 mi
29466 Mount Pleasant, SC 4.7 mi
29482 Sullivans Island, SC 5.6 mi
29403 Charleston, SC 6.0 mi

Find every ZIP code within 10 miles of 29423 →

Questions about this ZIP code

Where is ZIP code 29423?

29423 is in Charleston, South Carolina, in Charleston County, part of the Charleston-North Charleston, SC metropolitan area. Its published point location is 32.8488, -79.8577.

What county is 29423 in?

29423 lies in Charleston County.

What area code is 29423?

Charleston uses area codes 843 and 854, from NANPA's telephone records.

What time zone is 29423 in?

29423 uses America/New_York.

What ZIP codes are near 29423?

The closest are 29413 (0 mi), 29416 (0 mi), 29417 (0 mi), 29422 (0 mi) and 29464 (2 mi).

Is 29423 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. “29423 ZIP Code — Charleston, South Carolina (Charleston County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/29423

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/29423.json

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