This irritant tried dialing on 12 April and abandoned the call during the voice mail greeting. I am reasonably sure it's one among other illegal sales calls I've charted this month, hawking vehicle service contracts as mentioned prior. Comments linked below are for other numbers I suspect were used by the same creeps in the past week.
Cell phone carriers have nothing to do call blocking, only collecting their monthly fee for providing access to their phone tower network. Unfortunately we will always have spam callers until we legalize hunting them down and shooting them at their computers.
Because there are always enough morons handing over their ss / checking acct / credit card numbers. And the population is not getting any smarter, sad to say.