ZIP Code 20373

20373 is one of District of Columbia's ZIP codes, delivering to addresses in Naval Anacost Annex, District of Columbia.

City: Naval Anacost Annex
District: District of Columbia
State: District of Columbia
Prefix: 203xx

Where this code sits

20373 is part of the 203xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Naval Anacost Annex.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 20373 delivers to without sharing its boundary.

ZIP codes nearest 20373

The ZIP codes whose reference points sit closest to 20373.
ZIP code	Distance	Delivers to
ZIP code 20068	0.0 mi	Washington, DC
ZIP code 20228	0.0 mi	Washington, DC
ZIP code 20230	0.0 mi	Washington, DC
ZIP code 20245	0.0 mi	Washington, DC
ZIP code 20374	0.0 mi	Washington Navy Yard, DC
ZIP code 20388	0.0 mi	Washington Navy Yard, DC
ZIP code 20391	0.0 mi	Washington Navy Yard, DC
ZIP code 20398	0.0 mi	Washington Navy Yard, DC

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 20373, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 20373. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.