$ORIGIN good-mixed-undel-1.basic01.xa.            ; Must end with "."
$TTL 3600

@       SOA     ns1 admin. (
                2024041902      ; serial
                6h              ; refresh
                1h              ; retry
                1w              ; expire
                1d )            ; minimum
                
@		NS	ns1
@		NS	ns4
ns1		A	127.12.1.31
ns1		AAAA	fda1:b2:c3:0:127:12:1:31
ns4		A	127.12.1.34
ns4		AAAA	fda1:b2:c3:0:127:12:1:34

$ORIGIN parent.good-mixed-undel-1.basic01.xa.            ; Must end with "."

@		NS	ns1
@		NS	ns2
@               NS      ns4.good-mixed-undel-1.basic01.xa.
ns1		A	127.12.1.41
ns1		AAAA	fda1:b2:c3:0:127:12:1:41
ns2		A	127.12.1.42
ns2		AAAA	fda1:b2:c3:0:127:12:1:42