Received call from this number. Google Voice auto-blocked it as a known (to them) spam number. The earlier posts here are probably correct that it is Heather or Rachel from Card Services promising lower credit card rates, but in reality just pretty much stealing from anyone gullible enough to listen to them.
I don't think it's that they "get" your number as someone above asked, but rather that their damn robo-dialer just calls every possible number in an area code/prefix.
1 missed call from this number. Apparently trying to get someone to sign up for lowering credit card rates..... they want your money; a thinly disguised sales call. So much for the do not call list