Average GPS coordinates for Ipswich Postcode location: 45.449, -99.015. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Ipswich on map:

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Listing cities & postcodes (1):
>> South Dakota, 57451 Ipswich, Edmunds, GPS coordinates: 45.4489,-99.0148