It's not been my experience that frauds using a predictive dialer care about your state or national DNC registrations, hence it would be absurd for a mass dialer to abandon a call to you based on any such registration. The far more likely case is that someone else answered live before you could, and your call got dumped along with several others. The FCC and FTC have rules against that "ring and run" abuse, which the aforementioned frauds frequently violate.