I may have an answer as to what this is. Prior to this number calling my cell phone, I was getting calls from a personal land line in Oregon. It turned out to be a survey-taker (female), who was working (freelance?) for a BMW/MINI dealership by calling customers who had recently brought their cars in for servicing and asking them to rate the service. If you own a BMW or MINI (or perhaps another make of car or product--they may not do this exclusively with BMW), maybe this particular freelancer (I got a guy last time but today was a female--she said 'hello' then hung up)uses a calling card rather than a personal number to make the calls.