ZIP Code 99604

99604 is one of Alaska's ZIP codes, delivering to addresses in Hooper Bay, Kusilvak Census Area.

City: Hooper Bay
Borough or census area: Kusilvak Census Area
State: Alaska
Prefix: 996xx

Where this code sits

99604 is part of the 996xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Hooper Bay.

Hooper Bay Alaska ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 99604 delivers to without sharing its boundary.

907 Area code 907

ZIP codes nearest 99604

The ZIP codes whose reference points sit closest to 99604.
ZIP code	Distance	Delivers to
ZIP code 99563	17 mi	Chevak, AK
ZIP code 99662	28 mi	Scammon Bay, AK
ZIP code 99681	71 mi	Tununak, AK
ZIP code 99637	77 mi	Toksook Bay, AK
ZIP code 99630	80 mi	Mekoryuk, AK
ZIP code 99666	81 mi	Nunam Iqua, AK
ZIP code 99690	86 mi	Nightmute, AK
ZIP code 99554	94 mi	Alakanuk, AK

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 99604, plotted from its record coordinates.

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

Scope ZIP code 99604. 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.