I keep getting calls from this number as well and actually get part of a voicemail. Has to do with "if you have taken Propecia..." The announcement is the same as the commercials on TV that give you contact information for an Attorney if you have taken whichever drug may cause birth defects, death, etc.
Recevied several calls on my company owned cell. Recording stated that I've recently entered online contests of some sort at which time I ended the call. I can guarantee that I have never entered any contest and certainly would not include my employer's phone number.