Question : Ping by name and IP

Ping by name and IP

When I ping a computer by name, it gets the reply (Ip address)
When I ping a computer using : ping -a 10.10.10.10 , I get the reply too( computer name)
But when I use NSlookup Computername OR NSlookup Ipaddress, I get the following message :
"*** MyDCname.Mydomainame can't find 10.10.10.10: Non-existent domain".

What I am trying to do is to find where in DNS can I find a record for this computer.

any idea?

Thanks

Answer : Ping by name and IP

try ipconfig /flushdns and then ping -a again