ZIP Code 57421 Area Code

Amherst, South Dakota

Area Code

605

Primary area codes for South Dakota (per-ZIP data not available)

Location

ZIP Code57421
CityAmherst
StateSouth Dakota (SD)
CountyMarshall

Frequently Asked Questions

ZIP code 57421 is in Amherst, South Dakota. The primary area codes for South Dakota are 605.

ZIP code 57421 is in Amherst, South Dakota.

ZIP Code 57421

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