Who serves up more ads? Apple, BlackBerry or Android?

Millennial Media, a company which claims it serves up ads to 72 percent of 82 million mobile users in the United States just posted some stats, and they’re pretty interesting.

As far as number of ad impressions go, in June Apple served up 56 percent of the market — and that doesn’t fully take into account the iPhone 4 because of the timing. BlackBerry’s RIM/OS is in second place with 17 percent. Android holds 11 percent, dropping 4 percent since May. That drop is interesting because the Android OS is used on multiple different handsets from several different manufacturers.