Got a call hang up January 9 at 1145 am PDT. Notice the date these calls have been reported? Obviously crooks and the Feds were getting closer to them so they stole another phone number to keep the calls going. Screen all calls. There is no privacy today; thieves do not care about the DNC list. The new FCC law on robo calls will not stop them either. Since crooks from other countries can not be caught, they will continue. If you interact they sell your number as a live one to other crooks and you will get more calls while providing them with money.
Here we go again .... There was no "new FCC law on robo calls" in Summer 2015 or thereafter. In June last year the FCC issued a set of declaratory rulings to ease enforcement of the TCPA and the burdens which illegal calls place upon the public. We did not get new rules or new laws which require the President's signature. We got clarification of how industry, the courts, and the public should interpret the rules already in place.
Reports here cover not just one date, and nothing is "obvious" about why the fraudulent caller used this number for only four consecutive days. It is not uncommon for illegal sales callers to acquire and toss away phone numbers like soiled underwear, which diffuses their activity and keeps regulators guessing. But the fact that they are good at eluding punishment does not end our job of reporting and suing bad actors. The call centers may be in South Asia but sooner or later they answer to some string-puller in the States who can be found and neutralized.