Caller ID showed "name not found" and the fact the exchange is 141 which sounds bogus is proof enough this is a spam caller. I shut off my answer machine if I am close enough to do that when the call comes in so the line will seem like it is not connected and will not answer. They may call back again but that is their problem. My phone system is a phone system, not a spam filter so I can't make it ignore numbers that are not in the "known number" list of friends and family/business callers.
  I keep a list of numbers like this who have called and if I receive a second call then I put them on the blocking list. I had to start doing that because most of the spam callers never call back with the same number so I was rapidly filling up my 250 blocked number storage ability with people who never called back. There must be thousands so I only block the ones who call back. That reduced the list to about 60 numbers who were constant spam callers at any one time. And even that list can be pruned down if none of the numbers on it are calling back using the same numbers.
  The only thing we can do about this deplorable situation is complain to any official including politicians who will listen that Verizon and ATT are not addressing the problem of their system being used for illegal fraud and harassment. It's their phone system they are using so they are the ones directly in charge and responsible.
  We should not have to devote hours of our lives and $$$ dealing with telephone fraud and harassment.