$TTL 604800 ; example.org. IN SOA ns01.example.org. root.example.org. ( 1 ; Serial 600 ; Refresh 3600 ; Retry 1w ; Expire 360 ; Minimum TTL ) IN NS ns01.example.org. IN NS ns02.example.org. IN NS ns03.example.org. IN NS test.example.org. ns01 IN A 192.168.10.50 ns02 IN A 192.168.10.60 ns03 IN A 192.168.10.70 test IN A 192.168.10.12 ; SRV Records for LDAP _ldap._tcp.example.org. 3600 IN SRV 0 0 389 ns01.example.org.