20431
ZIP 20431 is in Washington, District of Columbia; area codes 202 and 771; Eastern time. Washington has 271 ZIP codes in all.
- Type
- Standard
- Time zone
- America/New_York
- County
- District of Columbia
- Metro area
- Washington-Arlington-Alexandria, DC-VA-MD-WV
- Population
- 0
- Coordinates
- 38.8989, -77.0442
Weather right now
Asking the National Weather Service…
Where 20431 is
Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.
- 🔢 Type 20431 into a pocket calculator and turn it upside down: IEhOZ — not quite a word, sorry.
- ➕ 20431 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 10, a total 513 other ZIP codes share.
- 💾In binary, the way a computer stores it:
100111111001111 - 🏠 Its numerical neighbours: 20429 (Washington, DC, 2 mi away) and 20433 (Washington, DC, 0 mi away).
- 🔄 Backwards, 20431 becomes 13402 — and that is a real ZIP code: Madison, NY, 288 miles away.
- 👥 68 other ZIP codes are made of exactly the same digits (01243, 01342, 01432, 02134, 02143, 02341, …). The farthest-flung twin is 34021 in APO AA, a military post office, 1,934 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 20431 and you would come out at 38.90°S, 102.96°E — 869 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 54m of daylight. Shortest: 9h 26m.
- 📏 At 0.007 square miles of land, 20431 is bigger than 0% of ZIP codes — about 3 football fields.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 0 |
|---|---|
| Households | 0 |
| Housing units | 0 |
| Population density | 0.0 / sq mi |
Business and tax activity
| Business establishments | 14This ZIP14 |
|---|---|
| Employees | 103This ZIP103 |
| Annual payroll | $6,928,000This ZIP$6,928,000 |
Land area
| Land area | 0.01 sq miThis ZIP0.01 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Other place names in 20431
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 20431
| ZIP | City | Distance |
|---|---|---|
20451 | Washington, DC | 0.1 mi |
20503 | Washington, DC | 0.1 mi |
20433 | Washington, DC | 0.1 mi |
20006 | Washington, DC | 0.2 mi |
20052 | Washington, DC | 0.2 mi |
20435 | Washington, DC | 0.2 mi |
20570 | Washington, DC | 0.2 mi |
20526 | Washington, DC | 0.2 mi |
20456 | Washington, DC | 0.2 mi |
20555 | Washington, DC | 0.2 mi |
Find every ZIP code within 10 miles of 20431 →
Questions about this ZIP code
Where is ZIP code 20431?
20431 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 38.8989, -77.0442.
What county is 20431 in?
20431 lies in District of Columbia.
What area code is 20431?
Washington uses area codes 202 and 771, from NANPA's telephone records.
What time zone is 20431 in?
20431 uses America/New_York.
How many people live in 20431?
About 0 people live in ZIP code 20431. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What ZIP codes are near 20431?
The closest are 20451 (0.1 mi), 20503 (0.1 mi), 20433 (0.1 mi), 20006 (0.2 mi) and 20052 (0.2 mi).
Is 20431 a PO Box ZIP code?
20431 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “20431 ZIP Code — Washington, District of Columbia.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20431
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/20431.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.