Who called from 4072050199

Same here.... when I answer they hang up.

same here - 4 times today - it is a man's voice - simply block the annoying jerk is what I just did!!

Same here.  I live in Missouri...and they called at 8:47 pm.  Not real thrilled they couldn't be bothered to even speak.

Have gotten a couple of calls from this number. No message. Tried to call back once and got a message that the extension was on the phone.
Not sure what sort of purpose this behavior could serve.

Why do people call these numbers back?  The most likely outcome of doing that is validating that your phone number is valid.

Just block them if you can (as I just did). Or ignore them.