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 — AREA-CODES/DC

District of Columbia area codes

The District of Columbia has 2 area codes, 202 and 771. They are overlays: each covers all of the District of Columbia, so a number from there can have any of them. The newest, 771, came into service in 2021.

Area codes
2
Areas
1
Overlay areas
1
Time zone
Eastern
Newest
771 (2021)

Somewhere in District of Columbia now? What area code am I in? answers from your location.

Every District of Columbia area code

Area codes in District of Columbia
CodeWhereOverlaysSince
202 Washington 771 1947
771 Washington 202 2021

District of Columbia area codes by area

Codes that overlay one another share one area. The places listed have a telephone rate centre of their own in NANPA's records, largest first; each links to its ZIP codes.

202, 771 — Washington

202 (1947) was here first; 771 (2021) overlays it, so a number from anywhere in the area can have any of them.

1 place:

County:

Area codes of the largest cities in District of Columbia

Largest cities in District of Columbia and their area codes
CityArea codesPopulation
Washington 202, 771 681,294
Naval Anacost Annex † 202, 771 383
Washington Navy Yard † 202, 771 0

† NANPA lists no rate centre for the town itself; these are the codes of the nearest one. A town on an area-code boundary can differ from its neighbour.

Questions about District of Columbia area codes

How many area codes does the District of Columbia have?

2: 202 and 771. Both of them are in overlay areas, where several codes share the same ground.

What is the newest area code in the District of Columbia?

771, in service since 2021. It overlays 202.

What are the area codes of the largest cities in the District of Columbia?

Washington: 202 and 771. Naval Anacost Annex: 202 and 771. Washington Navy Yard: 202 and 771.

What time zone are the District of Columbia area codes in?

Eastern time.

Every US area code · District of Columbia ZIP codes

Source: NANPA NPA database and central office code assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.

Cite this page

zipcodes.pro. “District of Columbia area codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-codes/dc

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