A second call came in today at 1204 PM CDT, Caller ID showed "Unknown Name". Our landline phone didn't ring since we had already blocked the number Apr 7th on their first attempt. We NEVER answer calls from numbers we don't recognize. Our Call Blocker unit will store 1500 numbers and we have used maybe 400 since we started using it Aug 2016. The number of annoying/suspicious calls have dropped from 10-12 per day to 1 or 2, some days none.