Called left no message? Who knows who this time?

Received a call from 319-230-9640 at about 7pm tonight. We weren't home and there was no message.

40+ missed calls from this number in just a few days. Calls almost every hour on the hour, sometimes 3-4 within a one hour time frame. Really?! Get a life. I only have this phone as it reduced our internet bill. I know they don't know that, but when someone doesn't ever answer the phone nor have a voicemail set up, give up after awhile!

I got a call from 1-319-230-9640 - trying to talk something - very noisy background, not sure what he was talking.

319-230-9460