Below is a list of Mililani HI zip codes. For your research we have also included Mililani Area Code, Time Zone, UTC and the local Honolulu County FIPS Code. Each Mililani Hawaii zip code has a center Longitude / Latitude point (the Mililani center is -158.02200317383 / 21.447599411011). For your convenience we have also indicated if that zip code in Mililani observes Daylight Savings time.