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/21275

21275

ZIP 21275 is in Baltimore, Maryland, in Baltimore City; area codes 410, 443 and 667; Eastern time. Baltimore has 42 ZIP codes in all.

Type
No street area
Time zone
America/New_York
Coordinates
39.2847, -76.6205

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 21201, whose figures describe that area — not this ZIP code.

☼ Live from 21275 — Baltimore, MD

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 21275 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 21275
  • 🔢 Type 21275 into a pocket calculator and turn it upside down: SLZIZ — not quite a word, sorry.
  • ➕ As a number, 21,275 = 5 × 5 × 23 × 37. Its digits add up to 17, a total 2,133 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101001100011011
  • 🏠 Its numerical neighbours: 21273 (Baltimore, MD, 0 mi away) and 21278 (Baltimore, MD, 0 mi away).
  • 🔄 Backwards, 21275 becomes 57212 — and that is a real ZIP code: Arlington, SD, 1,110 miles away.
  • 👥 33 other ZIP codes are made of exactly the same digits (12257, 12527, 12572, 12725, 12752, 15227, …). The farthest-flung twin is 75212 in Dallas, TX, 1,214 miles away.
  • 🧭 Farther north than 51% of all ZIP codes, and farther east than 83%.
  • 🎯1,167 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21275 and you would come out at 39.28°S, 103.38°E — 864 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 56m of daylight. Shortest: 9h 24m.
🌙 The sky over 21275 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Land area

ZIP codes near 21275

ZIPCityDistance
21203 Baltimore, MD 0.0 mi
21235 Baltimore, MD 0.0 mi
21241 Baltimore, MD 0.0 mi
21263 Baltimore, MD 0.0 mi
21264 Baltimore, MD 0.0 mi
21270 Baltimore, MD 0.0 mi
21273 Baltimore, MD 0.0 mi
21278 Baltimore, MD 0.0 mi
21279 Baltimore, MD 0.0 mi
21280 Baltimore, MD 0.0 mi

Find every ZIP code within 10 miles of 21275 →

Questions about this ZIP code

Where is ZIP code 21275?

21275 is in Baltimore, Maryland, in Baltimore city, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.2847, -76.6205.

What county is 21275 in?

21275 lies in Baltimore city.

What area code is 21275?

Baltimore uses area codes 410, 443 and 667, from NANPA's telephone records.

What time zone is 21275 in?

21275 uses America/New_York.

What ZIP codes are near 21275?

The closest are 21203 (0 mi), 21235 (0 mi), 21241 (0 mi), 21263 (0 mi) and 21264 (0 mi).

Is 21275 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. “21275 ZIP Code — Baltimore, Maryland (Baltimore City).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21275

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/21275.json

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