Unrecognized--suspected spam--called the number back and, voila!, the old "line sits there dead for 20 sec. then a fast busy." Bingo! Another spoofed number. Another new spammer. I'd like to tell him to go to he** but I'd rather just let it roll to voice mail and frustrate him more. Suggest you do the same. Or don't even answer it.
I stupidly answered, the person on the other end said something about "phone blast" and then hung up. some people in this world are literally worthless.