Below is a list of East Dennis MA zip codes. For your research we have also included East Dennis Area Code, Time Zone, UTC and the local Barnstable County FIPS Code. Each East Dennis Massachusetts zip code has a center Longitude / Latitude point (the East Dennis center is -70.161499023438 / 41.74280166626). For your convenience we have also indicated if that zip code in East Dennis observes Daylight Savings time.