Who called from 2177174838

Just got a call from this number. I answered but no one was there. I hung up after a few seconds.

Seems to be a series of numbers, from 217-717- at least 7 ending numbers. They never leave a message.

Got my first and last an hour or so ago.  It held on the whole answering machine message and hung up

Received a call on 05/04/2016 at 07:34 PM.  Voice mail was 5 seconds long but no message.  Caller ID shows, "Springfield IL."

Another # Blocked. This was on 5/4/16 after hours: 7 PM. CT. Must be a $pam or a BS Political thing since it's from Springfield IL. # was on the top & bottom.