have got a fake DNS Entry of 63.243.173.162

I have a network of 192.168.59.0 /24.
DHCP Client gets the IP from the server which is not in our network link 192.168.60.1 with the DHCP address of my firewall. Firewall is not configured for the DHCP Server.

DHCP CLient also get the dns Add of 63.243.173.162 & 64.86.133.51

when I trace the DHCP Server IP I get my firewall IP