This is why I love my Ooma telephone system. It's Voip and I can log in an blacklist phone numbers. This one is next. I now have over 100 numbers in the black list. I really recommend switching to Ooma. Never had a problem and it's free long distance in the USA and most of Canada. You only pay the stupid little government taxes every month which is about $3.00 and one yearly payment of about $150 if you want all the extra features which is well worth it. I love my blacklist!