KZON (103.9 FM) is a commercial radio station licensed to Gilbert, Arizona, and broadcasting to the Phoenix metropolitan area.
It simulcasts an adult contemporary radio format with co-owned KMVA 97.5 FM Dewey-Humboldt, Arizona, as "Hot 97.5/103.9."
[3][4] It was powered at only 3,000 watts, a fraction of its current output, so the station primarily focused on the Casa Grande Valley.
In September 1992, KQEZ's disc jockeys informed listeners that they had not been paid in a month; at that time, owner Christianson said he could not pay workers because of $200,000 in debt.
In 1998, KPTY evolved to a hybrid hip-hop/modern rock format shortly followed by a change of branding to "Party Radio @ 103.9."
During the last week of 1999, KPTY stunted with a supposed broadcast hijacking with buzzing sounds and audio glitches in the songs, legal IDs and sweepers, while the DJs were talking.
The 106.3 and 100.3 frequencies originally used by "The Edge" were sold to Hispanic Broadcasting Corporation (now Univision Radio) and switched to a Regional Mexican format.
On February 2, 2010, under the direction of Program Director Marc Young, the station's call letters were changed from KEDJ to KEXX to align with the "X 103.9" branding.
On December 27, 2013, Trumper Communications and Riviera Broadcasting Group announced that they would merge their Adult Top 40 outlets into one simulcast, with KMVA and KEXX becoming "Hot 97.5/103.9 Trending Radio."
On April 9, 2015, its HD2 digital subchannel became the high definition simulcast of KOAI in Sun City West.
[7] On April 23, 2024, KMVA and KZON shifted to mainstream adult contemporary, still keeping the "Hot" branding and positioning itself as "The Valley's Best Variety".