Getting calls late in the evening from this and 4 or 5 other "0011" prefix numbers - 5th number we recorded (missed recording a couple of the earlier ones as the kids were the ones to try to answer). Can only assume they are scammers or other such nuisance calls as we always let our answering machine pick up calls at night (due to the volume of scammer calls that we seem to get these days). Has anyone had the same experience? Tried calling the number back - it rings but no-one picks up.