Below is a list of Pleasanton CA zip codes. For your research we have also included Pleasanton Area Code, Time Zone, UTC and the local Alameda County FIPS Code. Each Pleasanton California zip code has a center Longitude / Latitude point (the Pleasanton center is -121.89700317383 / 37.675998687744). For your convenience we have also indicated if that zip code in Pleasanton observes Daylight Savings time.