Received a call from 559-206-2764, CallerID showing bunch of random digits, indicating it's likely a VoIP phone number. Blocked call while still ringing using call blocker device. Similar to another widely used spam number, 559-206-2763.

If you have a call blocker device, it's possible to block the first six to eight digits (or as few as the first three digits) of these spam phone numbers, in case they are on an incrementing dialer of some sort - this way you can block all similar phone numbers without having to program each one individually.