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/28123

28123

ZIP 28123 is Mount Mourne, North Carolina, in Iredell County; area codes 704 and 980; Eastern time.

Type
No street area
Time zone
America/New_York
County
Iredell
Coordinates
35.5432, -80.8473

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 28117, whose figures describe that area — not this ZIP code.

☼ Live from 28123 — Mount Mourne, NC

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 28123 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 28123
  • 🔢 Type 28123 into a pocket calculator and turn it upside down: EZIBZ — not quite a word, sorry.
  • ➕ 28123 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 16, a total 1,922 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 110110111011011
  • 🏠 Its numerical neighbours: 28120 (Mount Holly, NC, 18 mi away) and 28124 (Mount Pleasant, NC, 27 mi away).
  • 🔄 Backwards, 28123 becomes 32182 — and that is a real ZIP code: Orange Springs, FL, 422 miles away.
  • 👥 29 other ZIP codes are made of exactly the same digits (12238, 12823, 12832, 18223, 18232, 18322, …). The farthest-flung twin is 83221 in Blackfoot, ID, 1,761 miles away.
  • 🧭 Farther south than 71% of all ZIP codes, and farther east than 71%.
  • 🎯1,012 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 28123 and you would come out at 35.54°S, 99.15°E — 990 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 34m of daylight. Shortest: 9h 45m.
🌙 The sky over 28123 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments3This ZIP3
Employees16This ZIP16
Annual payroll$388,000This ZIP$388,000

Land area

ZIP codes near 28123

ZIPCityDistance
28035 Davidson, NC 3.0 mi
28117 Mooresville, NC 3.4 mi
28115 Mooresville, NC 4.6 mi
28036 Davidson, NC 5.2 mi
28031 Cornelius, NC 5.4 mi
28682 Terrell, NC 7.3 mi
28070 Huntersville, NC 9.2 mi
28166 Troutman, NC 9.3 mi
28078 Huntersville, NC 9.6 mi
28673 Sherrills Ford, NC 9.9 mi

Find every ZIP code within 10 miles of 28123 →

Questions about this ZIP code

Where is ZIP code 28123?

28123 is in Mount Mourne, North Carolina, in Iredell County, part of the Charlotte-Concord-Gastonia, NC-SC metropolitan area. Its published point location is 35.5432, -80.8473.

What county is 28123 in?

28123 lies in Iredell County.

What area code is 28123?

Mount Mourne uses area codes 704 and 980, from NANPA's telephone records.

What time zone is 28123 in?

28123 uses America/New_York.

What ZIP codes are near 28123?

The closest are 28035 (3 mi), 28117 (3.4 mi), 28115 (4.6 mi), 28036 (5.2 mi) and 28031 (5.4 mi).

Is 28123 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.

Download or cite

Cite this page

zipcodes.pro. “28123 ZIP Code — Mount Mourne, North Carolina (Iredell County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/28123

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/28123.json

Underlying data is public domain or openly licensed — sources, vintages and licences.