NPA - 475 (Connecticut)
The 475 area code is part of geographic numbering plan area that includes Connecticut.
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 state is the southern most in the New England area, sharing borders with Rhode Island, Massachusetts and New York. Connecticut's first European settlers were Dutchmen who established a small, short-lived settlement called Fort Hoop in Hartford. Although the first major settlements were established in the 1630s by the English.
The Connecticut River, Thames River, and ports along Long Island Sound have given Connecticut a strong maritime tradition which continues today. General Dynamics has an electric boat division that makes submarines in Groton. Other manufacturing includes United Technologies Corporation (UTC) based in Hartford. This company employs nearly 22,000 people in various divisions including Propulsion and Aerospace Systems manufacturing jet engines in the Pratt & Whitney building.
The other significant defence contractor in the state is Lockheen Martin subsidiary, Sikorsky Aircraft. They build helicopters in Connecticut's single largest manufacturing plant in Stratford.