From Wikipedia:
North Central State Airport is a general aviation airport located in Lincoln and Smithfield, Rhode Island. It has the IATA Airport Code SFZ. North Central is located in the upper region of the state and is roughly horizontally centered in the state; hence the name "North Central."
North Central State Airport generally caters to private pilots and general aviation, and the aircraft that are seen there are usually either of the single- or twin-engined propeller class. However, the airport does have facilities to fuel jet engine aircraft that require JET-A type fuel. The airport is not able to serve large airliners, and the use of North Central to these types of aircraft is purely emergency-related.
North Central State Airport is one of six active airports operated by the Rhode Island Airport Corporation. The other five airports include T.F. Green Airport, Quonset State Airport, Westerly State Airport, Newport State Airport, and Block Island State Airport.