Who called from 5152001052

Received 2 calls today from this #.

Received 2 calls did not answer.

515-200-1052...  
> First call was a 2 second voice message with just a bit of background noise.  
> The second day I answered and the machine hung up after a second.  As this area code is not far away, I thought the call could be legitimate and called back.  It went to an automated menu... "Press 1 to be removed from the call list, etc..."   I hung up, as I did not want to end up charged with $30 of 1-900 charge/etc...

Called 3 days in a row so far. I do not answer and they do not leave a message. Caller ID says Algona, Iowa

This number has called our home 3 times on Fri and today so far, 3 times, cuts off at 3 rings,never leaves a message.  COmes up as an UNKNOWN NUMBER.