$ORIGIN .
$TTL 604800	; 1 week
test.com		IN SOA	ns1.test.com. root.test.com. (
				4          ; serial
				86400      ; refresh (1 day)
				3600       ; retry (1 hour)
				604800     ; expire (1 week)
				2000000    ; minimum (3 weeks 2 days 3 hours 33 minutes 20 seconds)
				)
			NS	ns1.test.com.
			NS	ns2.test.com.
$ORIGIN test.com.
ns1			A	172.18.1.22
ns2			A	172.18.1.23
www			A	3.4.5.6