Who called from 4782773820

Received call from this number on my home phone on May 1, 2009 at 6:32 PM.  Name on caller ID was Silver Care One.  I didn't recognize the name or the number, so I didn't answer.  Interested to find out who they are and why they called me.  They didn't leave a message.

Calls continuously even though I've asked to be removed from their call list.

Pre-recorded message.  I did not listen long, hung up and reported this number to the Do Not Call Registry