WNPX is located almost 70 miles (110 km) east of Nashville and its UHF signal reaches the western portion of the Nashville television market only with great difficulty, if at all. For this reason the station utilizes a translator on WNPX-LP channel 20 to reach the western portion of Nashville.
WNPX is affiliated with the Ion Television network (formerly PAX-TV and i). The callsign is derived from "Nashville PaX." The station signed on in 1989, as WMTT, an independent station. WMTT changed its call sign to WKZX in 1994, became an affiliate of the WB Television Network in 1995, and then became WNPX in 1998, broadcasting Pax programming.