I keep getting calls from strange numers like this one and a few others telling me that my perscription order has been approved and they want to give me a tracking number.  If you get the tracking number from them, they then ask you for your address.  Clearly if you ordered from them they should already have your address.  I usually try to give them an address with profanities in it.  Like 12345 F-U Road or something like that.  Then they hang up.