example.		3600	IN	SOA	n1.example. hostmaster.ns1.example. 1 3600 1200 604800 7200
example.		3600	IN	NS	ns2.example.
example.		3600	IN	NS	ns3.example.
ns1.example.		3600	IN	A	10.53.0.1
ns2.example.		3600	IN	A	10.53.0.2
ns3.example.		3600	IN	A	10.53.0.3
example.		3600	IN	SOA	n1.example. hostmaster.ns1.example. 1 3600 1200 604800 7200