Below is a list of Dike IA zip codes. For your research we have also included Dike Area Code, Time Zone, UTC and the local Grundy County FIPS Code. Each Dike Iowa zip code has a center Longitude / Latitude point (the Dike center is -92.631896972656 / 42.463600158691). For your convenience we have also indicated if that zip code in Dike observes Daylight Savings time.