Typical robo-dial-dial/scammer call pattern - cell phone rings, do not recognize displayed number, do not answer, rolls over to voice mail, no message left = AUTO-REJECT ! ! !
Seems like they are having to change the spoofed number more often.... maybe a sign their numbers are getting blocked and rejected because everyone (hopefully) knows these are calls from criminals, and are not answering them. DO NOT ANSWER THESE CALLS.