Below is a list of Old Mystic CT zip codes. For your research we have also included Old Mystic Area Code, Time Zone, UTC and the local New London County FIPS Code. Each Old Mystic Connecticut zip code has a center Longitude / Latitude point (the Old Mystic center is -71.961799621582 / 41.391498565674). For your convenience we have also indicated if that zip code in Old Mystic observes Daylight Savings time.