Below is a list of Belknap County NH zip codes. For your research we have also included Belknap County Area Code, Time Zone, UTC and the local County FIPS Code. Each Belknap County New Hampshire zip code has a center Longitude / Latitude point (the Belknap County center is -71.431800842285 / 43.51789855957). For your convenience we have also indicated if that zip code in Belknap County observes Daylight Savings time.