$TTL	60000
@		IN	SOA	dnsroot.	root.dnsroot. (
			1 ; serial
			28 ; refresh
			14 ; retry
			3600000 ; expire
			60000 ; negative cache ttl
			)
@		IN	NS	dnsroot.
dnsroot.	IN	A	30.40.50.254

com.		IN	NS	dnscom.com.
dnscom.com.	IN	A	30.40.50.253