For over 40 years, 98KUPD has provided the greater Phoenix area with the best Active Rock music that the genre has to offer. 98KUPD is the home of “Holmberg’s Morning Sickness”, which has been dominating morning radio in Arizona for over 20 years! If you’re looking for Real Rock, we’ve got it! From Slipknot to Nirvana, Korn to Metallica, and the best entertainment to get you through a scorching hot day in Arizona. Arizona’s Real Rock is 98KUPD.