You can’t. Most are spoofing other “real” numbers for caller ID and blocked calls now. Pisses me off when someone calls me to complain about my number calling them for marketing. It a giant under 80 IQ announcement. Oh well.
“You can’t. Most are spoofing other “real” numbers for caller ID and blocked calls now. “
I know. What the OP posted as a “solution” will likely not work in many cases. If you execute a call return on one of those numbers you are likely not going to reach the telemarketer.