My caller ID showed an Unknown number with no message left.  Therefore, that = telemarketers and or scammers.   ID said  Kissimmee FL with no response to my hello.  Most of these are "robo calls with spoofed numbers," so reporting them does no good.  NEVER give or verify personal or financial information to ANYONE who makes an unsolicited call to you!!!  I "block" these numbers if they keep calling.