NPA - 603 (New Hampshire)
The 603 area code is part of geographic numbering plan area that includes New Hampshire.
There are a few special area codes with the last two digits 422 match, these are known as easily recognizable codes (ERCs). The 8xx set of numbers are reserved for toll-free services and communication.
The Granite State, as New Hampshire is popularly know as is the 5th smallest by area and the 10th least populous U.S. state. It is located in New England at the extreme northeastern corner of the country and is one of the 13 original U.S. states. It is bounded to the north by the Canadian province of Quebec, to the east by Maine and a 16-mile (25-km) stretch of the Atlantic Ocean, to the south by Massachusetts, and to the west by Vermont.
New Hampshire has a backyard vibe you’ll be pressed to find anywhere else. Go climbing to the top of a scenic mountain in the morning and be home to surf the seacoast at sunset. There are six ski mountains located around North Conway and the Mt Washington Valley, including Attitash, Black Mountain, Bretton Woods, Cranmore Mountain Resort King Pine and Wildcat.
Historically, New Hampshire was a major center for textile manufacturing, shoemaking, and papermaking, with Amoskeag Manufacturing Company in Manchester at one time being the largest cotton textile plant in the world.
Among prominent individuals from New Hampshire are founding restaurateurs Richard and Maurice McDonald. According to the 2001 book Fast Food Nation by Eric Schlosser, nearly one in eight workers in the U.S. have worked at a McDonald’s at one point in their lives.