Just block and report, block and report. This number was already filtered as spam by google voice but I check the numbers in the spam folder periodically to verify and then BLOCK spammer/scammer numbers. No need to ever endure more than one call from any spam number. We only get about 1 telemarketing call a week, often much less, as I am a pretty rabid anti-spam activist and stay on top of blocking them, so our number doesn't get proliferated to a bunch of telemarketing lists. When they try to call us, they get a not in service message which SUPPOSEDLY is the thing that kicks your number out of robodialers.
Received call from this number at 5:24 pm on 2014-09-11. Could not hear caller over TV show I was watching, told caller to "Wait one second." By the time I had muted TV, caller had hung up. Fed number to Google and found this site. Thanks for your useful info.