Calls and hangs up .  Doesn't leave messages

One of many calls I have gotten that they call and don't leave a message.

Same as others, this and 9 other unknown calls, I keep a log of all the phone numbers, usually for mortgage refi, student loan forgiveness, stupid hang ups, never leaves voice mail messages, all spam/scam and robot calls. Dumb and annoying.

Unwanted call from 850-213-5957. Will not answer unidentified call
Too many scammers. Need to stop.

This is an unsolicited student loan modification. When I tried to be removed the operator hung up on me!