Below is a list of Northumberland NH zip codes. For your research we have also included Northumberland Area Code, Time Zone, UTC and the local Coos County FIPS Code. Each Northumberland New Hampshire zip code has a center Longitude / Latitude point (the Northumberland center is -71.559501647949 / 44.562801361084). For your convenience we have also indicated if that zip code in Northumberland observes Daylight Savings time.