Find the last 4 digits (ZIP+4) for an address in 51231

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ZIP Code 51231 – Archer, IA

Archer, Iowa · O'Brien County · Central time

ZIP code51231
CityArcher
StateIowa
CountyO'Brien County
Population562
Time zoneCentral · local time
ZIP typeStandard (has a Census ZCTA area)
Land area24.21 sq mi
Center (lat, long)43.1057, -95.7413

Area codes in this area

712

These are the area codes that most often serve ZIP 51231 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

51245 Primghar · 7.3 mi51238 Hospers · 7.9 mi51248 Sanborn · 8 mi51201 Sheldon · 8.2 mi51022 Granville · 10.3 mi51046 Paullina · 10.4 mi51232 Ashton · 13.5 mi51244 Matlock · 13.6 mi

About ZIP 51231

ZIP code 51231 is assigned to Archer, Iowa. It lies in O'Brien County. Its Census area covers about 24.21 square miles of land. The closest neighboring ZIP is 51245 (Primghar), about 7.3 miles away.

Every address in 51231 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources