ZIP Code 70403

70403 is one of Louisiana's ZIP codes, delivering to addresses in Hammond, Tangipahoa Parish.

City: Hammond
Parish: Tangipahoa Parish
State: Louisiana
Prefix: 704xx

Where this code sits

70403 is part of the 704xx range, the group of codes handled by one mail processing centre. Hammond is served by 4 ZIP codes in total; the full list, with the parish each falls in, is on the Hammond page.

Hammond Louisiana ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 70403 delivers to without sharing its boundary.

ZIP codes nearest 70403

The ZIP codes whose reference points sit closest to 70403.
ZIP code	Distance	Delivers to
ZIP code 70404	1.0 mi	Hammond, LA
ZIP code 70402	1.7 mi	Hammond, LA
ZIP code 70401	2.2 mi	Hammond, LA
ZIP code 70454	3.9 mi	Ponchatoula, LA
ZIP code 70451	4.3 mi	Natalbany, LA
ZIP code 70466	5.3 mi	Tickfaw, LA
ZIP code 70711	7.7 mi	Albany, LA
ZIP code 70455	8.1 mi	Robert, LA

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 70403, plotted from its record coordinates.

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

Scope ZIP code 70403. 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.