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/20203

20203

ZIP 20203 is in Washington, District of Columbia; area codes 202 and 771; Eastern time. Washington has 271 ZIP codes in all.

Type
No street area
Time zone
America/New_York
Coordinates
38.9053, -77.0466

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 20036, whose figures describe that area — not this ZIP code.

☼ Live from 20203 — Washington, DC

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 20203 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 20203
  • 🔢 Type 20203 into a pocket calculator and turn it upside down: EOZOZ — not quite a word, sorry.
  • ➕ As a number, 20,203 = 89 × 227. Its digits add up to 7, a total 150 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100111011101011
  • 🏠 Its numerical neighbours: 20202 (Washington, DC, 2 mi away) and 20204 (Washington, DC, 2 mi away).
  • 🔄 Backwards, 20203 becomes 30202, which is not a ZIP code at all.
  • 👥 11 other ZIP codes are made of exactly the same digits (02032, 02203, 02302, 03220, 20032, 20230, …). The farthest-flung twin is 30220 in Grantville, GA, 585 miles away.
  • 🧭 Farther south than 51% of all ZIP codes, and farther east than 81%.
  • 🎯1,149 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 20203 and you would come out at 38.91°S, 102.95°E — 870 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 54m of daylight. Shortest: 9h 26m.
🌙 The sky over 20203 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Land area

ZIP codes near 20203

ZIPCityDistance
20063 Washington, DC 0.0 mi
20579 Washington, DC 0.1 mi
20437 Washington, DC 0.2 mi
20586 Washington, DC 0.2 mi
20427 Washington, DC 0.2 mi
20526 Washington, DC 0.3 mi
20036 Washington, DC 0.3 mi
20027 Washington, DC 0.4 mi
20503 Washington, DC 0.4 mi
20433 Washington, DC 0.4 mi

Find every ZIP code within 10 miles of 20203 →

Questions about this ZIP code

Where is ZIP code 20203?

20203 is in Washington, District of Columbia, in District of Columbia, part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan area. Its published point location is 38.9053, -77.0466.

What county is 20203 in?

20203 lies in District of Columbia.

What area code is 20203?

Washington uses area codes 202 and 771, from NANPA's telephone records.

What time zone is 20203 in?

20203 uses America/New_York.

What ZIP codes are near 20203?

The closest are 20063 (0 mi), 20579 (0.1 mi), 20437 (0.2 mi), 20586 (0.2 mi) and 20427 (0.2 mi).

Is 20203 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. “20203 ZIP Code — Washington, District of Columbia.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20203

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/20203.json

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