KXXMFM

KXXMFM is a commercial radio station that broadcasts on the frequency 99.9 MHz in the metropolitan area of Redwood City, California. The station, which began operations in 1998 under the call sign KRDX, was rebranded as KXXMFM in 2003 when it adopted a contemporary hit radio (CHR) format. The branding slogan "The X Factor" reflects its focus on current pop, hip‑hop, and rhythmic music. KXXMFM’s signal coverage extends across the San Francisco Bay Area, reaching listeners from the San Francisco peninsula to the Santa Clara Valley.

The station is owned by Redwood Media Group, a local media conglomerate that also operates several other FM and AM stations in the region. KXXMFM operates from a transmitter located on Green Peak, a mountainous ridge that provides clear line-of-sight over the densely populated Bay Area. Its effective radiated power is 100,000 watts, the maximum for commercial FM stations in the United States, allowing it to maintain a wide listener base. The station’s studios are housed in the Redwood City City Hall annex, where a team of on-air personalities, market analysts, and production staff create daily programming.

KXXMFM engages in community outreach through concerts, charity events, and partnerships with local high schools. The station also offers a robust online streaming platform, podcast segments, and a mobile app, enabling it to reach a global audience. Its programming schedule blends music blocks with interactive segments, such as “Top 10 Countdown” and “Listener Requests.” Ratings data from Nielsen Audio consistently place KXXMFM among the top 10 stations in the Bay Area’s over‑18 demographic, illustrating its strong market position and popular appeal.