A restricted number displaying on Caller ID as Anonymous called..

Jul-06 01:46 PM - Saturday
Jul-30 11:00 AM - Tuesday
Aug-06 10:36 AM - Tuesday
Aug-22 10:06 AM - Thursday
Aug-24 03:00 PM  - Saturday
Aug-31 04:50 PM - Saturday
Sep-01 03:25 PM - Sunday
Sep-02 11:42 AM - Holiday
Sep-03 11:10 AM
Sep-03 04:30 PM
Sep-04 08:53 AM
Sep-04 06:15 PM
Sep-05 06:05 PM
Sep-06 09:49 AM - Friday
Sep-06 06:31 PM -
Sep-07 09:09 AM - Saturday
Sep-12 06:50 PM - Thursday

 It's actually interesting and not random ... different days, times, work days, ...  18 tries.  I wonder what it's like to program an auto-dialer ...