[2] Z100 carries 2 syndicated shows on weekdays, "Johnjay and Rich" in morning drive time[3] and Ryan Seacrest at midday.

The station played mostly instrumental cover versions of popular songs, as well as Broadway and Hollywood showtunes.

The following year, the station was acquired by Golden West Broadcasting, owned by singer-actor Gene Autry.

KKRZ began its current Top 40 format on March 16, 1984, widely mirroring co-owned WHTZ in New York City (including the moniker familiar "Z100" name).

In 1999, KKRZ picked up competition from Adult Contemporary-formatted KXL-FM, who flipped to rhythmic CHR, becoming KXJM, "Jammin 95.5."

This competition between the two would last for nine years, as KXJM (whose playlist favored Hip-Hop/R&B and some Dance product) would overtake KKRZ (who shifted back to a more mainstream direction).

On September 16, 2014, Clear Channel renamed itself iHeartMedia to bring its corporate name in line with its iHeartRadio internet platform.

These included Gary Bryan, Dan Clark, John Murphy, Tony Martinez, Nelson the Intern, Scott Thrower, Billy Hayes, Valerie Ring and Brooke Belson.

In the same week that BuckHead received the Edison Media Top 30 Under 30 Personality Award, KKRZ management Brian Bridgman, Tony Coles and Robert Dove began running short, cryptic spots about "T-Man" coming to Portland.

The T-Man Show was based in Seattle at co-owned KUBE and was also syndicated in San Francisco at iHeart-owned KYLD, before being pulled after six months.

Weekends feature American Top 40 with Ryan Seacrest, the iHeartRadio Countdown, On The Move with Enrique Santos, Most Requested Live with Romeo and The Vibe with Tanya and EJ.