Below is a list of Callender IA zip codes. For your research we have also included Callender Area Code, Time Zone, UTC and the local Webster County FIPS Code. Each Callender Iowa zip code has a center Longitude / Latitude point (the Callender center is -94.295196533203 / 42.361698150635). For your convenience we have also indicated if that zip code in Callender observes Daylight Savings time.