ZIP Code 51647

51647 is one of Iowa's ZIP codes, delivering to addresses in Northboro, Page County.

City: Northboro
County: Page County
State: Iowa
Prefix: 516xx

Where this code sits

51647 is part of the 516xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Northboro.

Northboro Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51647 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51647

The ZIP codes whose reference points sit closest to 51647.
ZIP code	Distance	Delivers to
ZIP code 64498	5.3 mi	Westboro, MO
ZIP code 51630	5.5 mi	Blanchard, IA
ZIP code 51636	6.0 mi	Coin, IA
ZIP code 51637	10 mi	College Springs, IA
ZIP code 51601	11 mi	Shenandoah, IA
ZIP code 51603	11 mi	Shenandoah, IA
ZIP code 51639	12 mi	Farragut, IA
ZIP code 64445	12 mi	Elmo, MO

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 51647, plotted from its record coordinates.

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

Scope ZIP code 51647. 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.