Quote Originally Posted by Ansextra View Post
Nomorobo seems to block people using Skype. I had to remove it from one of my lines because I have a regular Skype caller.
Then NoMoRobo may be useless for me as well; our business is International and many overseas callers call us using Skype-Out and one of our Toll-Free numbers (much cheaper for us than buying phone number in foreign companies and forwarding to us over SIP or POTS).

The reason is simple. NoMoRobo looks to see how many incoming calls come from the same number at the same time (they don't publish their threshold numbers, but they do allude to the method); if there are more than a threshold amount, NoMoRobo knows the call is from a robocaller. But Skype-Out of course has only a limited number of outgoing CID numbers to use on outgoing calls and if there are a lot of calls likely uses the same number many times.

Jeff