Below is a list of Calamus IA zip codes. For your research we have also included Calamus Area Code, Time Zone, UTC and the local Clinton County FIPS Code. Each Calamus Iowa zip code has a center Longitude / Latitude point (the Calamus center is -90.762298583984 / 41.829299926758). For your convenience we have also indicated if that zip code in Calamus observes Daylight Savings time.