Pandora, the highly popular Internet radio service, announced today at the CTIA Wireless 2012 conference in New Orleans, that it now has more than 150 million registered users, making the online radio provider one of the most heavily-used Internet services in the U.S. Speaking at the stage is Pandora CEO and President Joe Kennedy who broke the announcement.

Kennedy said that more than 100 million of its users are accessing Pandora via smartphones and tablets – a proof that its radio service appeals quite well to mobile users. He went on to say that Pandora is the second most downloaded iPhone app of all time and that the company’s adoption of car tech has been “aggressive” with 48 models across 18 auto brands supporting the in-car app.

Venture Beat commented that the U.S. Census Bureau estimates that about 311 million people live in the U.S. as of March 2012. Hence, this means that Pandora has amassed quite a number of users in the U.S. As of April 2012, Pandora listeners consumed 1.06 billion hours of radio, an increase of 87 percent from a year ago. It’s important to note that while Pandora has more than 150 million registered users, some users might have duplicate accounts or simply one-time listeners. Nevertheless, the number is still staggering.

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