The WhitePages company announced today that it has acquired Mr. Number, a popular app used for retrieving caller identification and blocking some numbers. According to the press release, WhitePages will add Mr. Number to its own stable of mobile apps, which includes Current Caller ID, their own solution for the same market niche. It's not immediately apparent whether development will continue on Current, Mr. Number, or both, or indeed whether the developers who created Mr. Number have been hired by WhitePages.
If Mr. Number is ringing a bell for you, you might recall the controversial crowd-sourced caller ID feature that the developer was forced to disable after a change in Google's terms of service.