$TTL 2d @ IN SOA a.and. hostmaster.a.and. ( 2 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL and. NS a.and. a.and. A 10.30.20.2 $ORIGIN piros.and. @ NS ns.zold.and. ns.zold.and. A 10.30.20.3 $ORIGIN zold.and. @ NS ns ns A 10.30.20.3