Below is a list of Barnum IA zip codes. For your research we have also included Barnum Area Code, Time Zone, UTC and the local Webster County FIPS Code. Each Barnum Iowa zip code has a center Longitude / Latitude point (the Barnum center is -94.365097045898 / 42.505699157715). For your convenience we have also indicated if that zip code in Barnum observes Daylight Savings time.