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/20373

20373

ZIP 20373 is Naval Anacost Annex, District of Columbia; area codes 202 and 771; Eastern time.

Type
Standard
Time zone
America/New_York
Population
383
Coordinates
38.8545, -77.0131
☼ Live from 20373 — Naval Anacost Annex, DC

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 20373 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.

★ Weird and wonderful facts about 20373
  • 🔢 Type 20373 into a pocket calculator and turn it upside down: ELEOZ — not quite a word, sorry.
  • ➕ As a number, 20,373 = 3 × 6791. Its digits add up to 15, a total 1,657 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100111110010101
  • 🏠 Its numerical neighbours: 20372 (Washington, DC, 3 mi away) and 20374 (Washington Navy Yard, DC, 3 mi away).
  • 🔄 Backwards, 20373 becomes 37302 — and that is a real ZIP code: Apison, TN, 515 miles away.
  • 👥 29 other ZIP codes are made of exactly the same digits (02337, 03237, 03273, 20733, 23307, 23703, …). The farthest-flung twin is 73023 in Chickasha, OK, 1,182 miles away.
  • 🧭 Farther south than 52% of all ZIP codes, and farther east than 82%.
  • 🎯1,152 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 20373 and you would come out at 38.85°S, 102.99°E — 866 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 54m of daylight. Shortest: 9h 26m.
  • 📏 At 0.505 square miles of land, 20373 is bigger than 5% of ZIP codes — about 244 football fields.
🌙 The sky over 20373 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population383This ZIP383
Households25This ZIP25
Housing units40This ZIP40
Median age20.3This ZIP20.3District of Columbia34.9US 38.9
Bachelor's degree or higher34.1%This ZIP34.1%
Mean commute13.3 minThis ZIP13.3 min
Population density758.4 / sq miThis ZIP758.4 / sq mi

Business and tax activity

Business establishments7This ZIP7
Employees79This ZIP79
Annual payroll$10,973,000This ZIP$10,973,000

Land area

Land area0.51 sq miThis ZIP0.51 sq mi
Water area0.18 sq miThis ZIP0.18 sq mi

Other place names in 20373

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 20373

ZIPCityDistance
20319 Washington, DC 0.9 mi
20242 Washington, DC 1.3 mi
20024 Washington, DC 1.3 mi
20460 Washington, DC 1.5 mi
20032 Washington, DC 1.6 mi
20388 Washington Navy Yard, DC 1.6 mi
20020 Washington, DC 1.9 mi
20375 Washington, DC 2.0 mi
20390 Washington, DC 2.0 mi
22202 Arlington, VA 2.1 mi

Find every ZIP code within 10 miles of 20373 →

Questions about this ZIP code

Where is ZIP code 20373?

20373 is in Naval Anacost Annex, District of Columbia, in District of Columbia, part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan area. Its published point location is 38.8545, -77.0131.

What county is 20373 in?

20373 lies in District of Columbia.

What area code is 20373?

Naval Anacost Annex uses area codes 202 and 771, from NANPA's telephone records.

What time zone is 20373 in?

20373 uses America/New_York.

How many people live in 20373?

About 383 people live in ZIP code 20373, in 25 households, at 758.4 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What ZIP codes are near 20373?

The closest are 20319 (0.9 mi), 20242 (1.3 mi), 20024 (1.3 mi), 20460 (1.5 mi) and 20032 (1.6 mi).

Is 20373 a PO Box ZIP code?

20373 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “20373 ZIP Code — Naval Anacost Annex, District of Columbia.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20373

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/20373.json

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