|Channels||Digital: 51 (UHF)|
|Subchannels||50.1 ION TV
|Owner||Ion Media Networks, Inc.
(ION Media Memphis License, Inc.)
|First air date||December 31, 1994|
|Call letters' meaning||PaX TV
X = disambiguation from other ION affiliates
|Former callsigns||WFBI (1994-1998)|
|Former channel number(s)||Analog:
50 (UHF, 1994-2009)
|Former affiliations||HSN (1994-1998)
Pax TV (1998-2005)
i (2005-2007, secondary from 2006)
MyNetwork TV (2006-2009)
|Transmitter power||1000 kW|
The station signed on the air on December 31, 1994, under the call letters WFBI and was owned by Memphis businessman, radiologist (and later Shelby County commissioner) George Flinn. The station initially aired a feed from the Home Shopping Network, until Paxson Communications (now ION Media Networks) took over the station in 1998, when the station was converted to the then-new PAX network (now known as Ion Television) (Flinn still owned the station, however).
On September 5, 2006, WPXX officially became the city's MyNetworkTV affiliate, branding itself as "My50 Memphis".
In mid-August 2007, ION announced that it would be purchasing WPXX and WPXL in New Orleans outright from Flinn Broadcasting for $18 million.  The transfer must be approved by the Federal Communications Commission.
The sale was completed on January 2, 2008.
On September 28, 2009, WPXX dropped MyNetworkTV completely as a part of an out given by the network as part of its conversion from a full network to a syndicated programming service by voiding all affiliation agreements. CW affiliate WLMT (Channel 30) chose to pick up the network, but only for the purposes of carrying WWE SmackDown on Saturday evenings, declining the remainder of the network's schedule. That lasted until SmackDown moved to SyFy in October 2010, at which point WLMT's second digital subchannel picked up the full MyNetworkTV lineup while retaining the Retro Television Network (RTV) affiliation (which would be dropped in November 2011 in favor of Me-TV) outside of prime time.