@ IN SOA hg.local. root.hg.local. ( 3 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ); Negative Cache TTL ;---Name Server Information @ IN NS dns1.hg.local. ;---Reverse lookup for Name Server 11 IN PTR dns1.hg.local. ;---PTR Record IP address to HostName 14 IN PTR apps1.hg.local. 15 IN PTR mail1.hg.local.