ZIP Code 50523

50523 is one of Iowa's ZIP codes, delivering to addresses in Callender, Webster County.

City: Callender
County: Webster County
State: Iowa
Prefix: 505xx

Where this code sits

50523 is part of the 505xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Callender.

Callender Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 50523 delivers to without sharing its boundary.

515 Area code 515

ZIP codes nearest 50523

The ZIP codes whose reference points sit closest to 50523.
ZIP code	Distance	Delivers to
ZIP code 50543	5.1 mi	Gowrie, IA
ZIP code 50566	6.2 mi	Moorland, IA
ZIP code 50544	8.0 mi	Harcourt, IA
ZIP code 50569	8.2 mi	Otho, IA
ZIP code 50586	8.4 mi	Somers, IA
ZIP code 50521	8.6 mi	Burnside, IA
ZIP code 50538	9.1 mi	Farnhamville, IA
ZIP code 50552	12 mi	Knierim, IA

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 50523, plotted from its record coordinates.

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

Scope ZIP code 50523. 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.