Called today, silence on their end, blocked them with the CPR Call Blocker which is a great machinel. It has the capability of blocking entire area codes, area codes with prefixes, or entire numbers. For $79 on Amazon, this machine has brought peace back into our home. It can block 1200 numbers and after three years, we have 134 calls blocked.
When getting an unrecognized call like this one,we don't answer but type the number into Google without spaces and almost inevitably it will tell if it is a bogus number. I then turn my phone ON, push **7#, add the area code, prefix, or number, then # and it is done. Never will hear from them again unless......we are on a call and these clowns happen to call, then it will signal an incoming call with ID. I check my handy list and if it is a bad number, forgettabout it.
Any questions I have had about this machine, an email to the manufacturer brings an immediate personal response. Can't recommend it any higher.