"Unknown Name"

This number came on my ID on 3/13 at 10.31 AM, did not leave any message.

This call came up on ID 10:52 am 5/1/09   dublin oh left no message

I answered and said hello twice with no response. I hung up.

This is Discover Card, and they call several times a day, even to numbers on the 'do not call list'!