ZIP Code 20456

20456 is one of District of Columbia's ZIP codes, delivering to addresses in Washington, District of Columbia.

City

Washington

District

District of Columbia

State

District of Columbia

Prefix

204xx

Where this code sits

20456 is part of the 204xx range, the group of codes handled by one mail processing centre. Washington is served by 271 ZIP codes in total; the full list, with the district each falls in, is on the Washington page.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 20456 delivers to without sharing its boundary.

ZIP codes nearest 20456

The ZIP codes whose reference points sit closest to 20456.
ZIP code	Distance	Delivers to
ZIP code 20570	0.1 mi	Washington, DC
ZIP code 20240	0.1 mi	Washington, DC
ZIP code 20435	0.1 mi	Washington, DC
ZIP code 20555	0.1 mi	Washington, DC
ZIP code 20431	0.1 mi	Washington, DC
ZIP code 20506	0.2 mi	Washington, DC
ZIP code 20433	0.2 mi	Washington, DC
ZIP code 20232	0.2 mi	Washington, 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 20456, plotted from its record coordinates.

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

Scope ZIP code 20456. 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.