Below is a list of Coulter IA zip codes. For your research we have also included Coulter Area Code, Time Zone, UTC and the local Franklin County FIPS Code. Each Coulter Iowa zip code has a center Longitude / Latitude point (the Coulter center is -93.369903564453 / 42.732799530029). For your convenience we have also indicated if that zip code in Coulter observes Daylight Savings time.