Below is a list of Arnold CA zip codes. For your research we have also included Arnold Area Code, Time Zone, UTC and the local Calaveras County FIPS Code. Each Arnold California zip code has a center Longitude / Latitude point (the Arnold center is -120.333 / 38.2638). For your convenience we have also indicated if that zip code in Arnold observes Daylight Savings time. For more information on Arnold California you will find helpful business links and searches.