Clear Channel announced today that its iHeartRadio service has surpassed 135 million downloads and 20 million registered users. On top of that, the iHeartRadio network is now seeing 239 million monthly listeners and over 48 million monthly digital uniques.

“Registered users only represent a portion of iHeartRadio’s total listener base, since registration is only required for the Custom Station feature which launched in September 2011,” a spokesperson for Clear Channel tells WebProNews.

According to Clear Channel, iHeartRadio’s registered users are growing faster than Facebook, Twitter, Pandora, Spotify and Instagram.

“iHeartRadio has experienced unprecedented growth as it continues to resonate with our listeners and super-serve our partners,” said Brian Lakamp, President of Digital, Clear Channel Media and Entertainment. “The reach of our broadcast radio properties, combined with our digital platforms truly creates unmatched promotional power that is unique to Clear Channel and allows us to be wherever our listeners are with the products and services they expect.”

“iHeartRadio has reinvented the digital radio experience and is a key element of how Clear Channel continues to reshape the media and entertainment industry,” said CEO John Hogan. “iHeartRadio’s rapid growth and success is a testament to Clear Channel’s ability to engage audiences with our variety of assets, including live events such as the iHeartRadio Music Festival, world-class talent and premier partnerships.”

iHeartRadio provides users with access to not only custom radio stations (Pandora-style), but access to live broadcasts from over 1,500 radio stations in 150 cities. It includes all the Clear Channel radio stations, as well as stations from other groups, like Univision, Cumulus, Greater Media stations, WNYC, EMF’s Contemporary Christian Air1 and K Love stations, college radio, Cox, Emmis, etc.

The app is available on numerous devices ranging from web, mobile and tablets to automotive, TV and gaming devices.