Question : Ping -a reply

I used to have a computer in the domain compx.mydomain.com (IP:10.10.10.10), For now I unchecked " Register this connection's addresses in DNS" and left compx.mydomain.com record in DNS and changed its IP to 11.11.11.11.
everything is fine up to this point.
what I don't understand is when I use this command:


PING -a 10.10.10.10 I got:
Pinging compx [10.10.10.10] with 32 bytes of data:

Reply from 10.10.10.10: bytes 32 time=35ms TTL=126
Reply from 10.10.10.10: bytes 32 time=35ms TTL=126
Reply from 10.10.10.10: bytes 32 time=35ms TTL=126
Reply from 10.10.10.10: bytes 32 time=35ms TTL=126

I wonder where it got the name of the computer in this line:
Pinging compx [10.10.10.10] with 32 bytes of data
I checked the reverse lookup zone and didn't find any record for 10.10.10.10

Answer : Ping -a reply

Probably you have to clean local DNS cache:
ipconfig /flushdns

than ping again.