$TTL 1000
@		in	soa	localhost. postmaster.localhost. (
				1993050801	;serial
				3600		;refresh
				1800		;retry
				604800		;expiration
				3600 )		;minimum
a.b.c		in	DNAME	x.y.z
a.x.y.z		in	A	1.2.3.4