Below is a list of Whitethorn CA zip codes. For your research we have also included Whitethorn Area Code, Time Zone, UTC and the local Humboldt County FIPS Code. Each Whitethorn California zip code has a center Longitude / Latitude point (the Whitethorn center is -123.94200134277 / 40.023899078369). For your convenience we have also indicated if that zip code in Whitethorn observes Daylight Savings time.