Hyannis, NE is a city located in Grant County, Nebraska and has a land area of 428.72 square miles (1,110.38 km2). The water area for the city is 4.87 square miles or 12.61 km2. There is one unique zip code in Hyannis, Nebraska and it is 69350. The area code(s) for Hyannis is 308.
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