$ORIGIN 3.0.0.0.1.1.0.0.7.2.1.0.0.0.0.0.3.c.0.0.2.b.0.0.1.a.d.f.ip6.arpa. ; Must end with "."
$TTL 3600

@       SOA     ns1 admin. (
                2025022400      ; serial
                6h              ; refresh
                1h              ; retry
                1w              ; expire
                1d )            ; minimum

                NS	ns1.address03.xa.
                NS	ns2.address03.xa.
;;;
;;; Name servers for parent zone
;;;
1.2.0.0         PTR     ns1.address03.xa.
2.2.0.0         PTR     ns2.address03.xa.

;;;
;;; Name servers for child (scenario) zones
;;;

;; For the “happy path”.
1.3.0.0         PTR     ns1.child.address03.xa.

;; One more for the “happy path”.
2.3.0.0         PTR     ns2.child.address03.xa.

;; Multiple PTR records, among which one matches the actual name server name.
;; For the curious: the languages used are English, French, Swedish, German,
;; Dutch and Esperanto.
3.3.0.0         PTR     ns3.child.address03.xa.
                PTR     name-server-three.child.address03.xa.
                PTR     serveur-de-noms-trois.child.address03.xa.
                PTR     namnsevrar-tre.child.address03.xa.
                PTR     nameserver-drei.child.address03.xa.
                PTR     naamserver-drie.child.address03.xa.
                PTR     nomservilo-tri.child.address03.xa.

;; Empty non-terminal.
_.4.3.0.0       TXT     "To make the parent node an empty non-terminal"


;; Nonexistent node. This name server has no reverse DNS at all.
; 5.3.0.0       PTR     nothing-here.invalid.

;; This name server has reverse DNS for IPv6 only, none for IPv4.
6.3.0.0         PTR     ns6.child.address03.xa.

;; Nonexistent node. This name server has reverse DNS for IPv4 only, none for IPv6.
; 7.3.0.0       PTR     ns7.child.address03.xa.

;; Non-matching name.
8.3.0.0         PTR     a-naughty-nameserver.child.address03.xa.

;; Multiple non-matching names.
9.3.0.0         PTR     non-matching-set-1.child.address03.xa.
                PTR     non-matching-set-2.child.address03.xa.

;; An alias to a node with a good PTR record set (which is legal, and can
;; happen with classless IN-ADDR.ARPA delegation, as in RFC 2317).
0.4.0.0         CNAME   0-4-0-0.alias
0-4-0-0.alias   PTR     ns10.child.address03.xa.

;; Another good alias, but the target is in another zone.
1.4.0.0         CNAME   1-4-0-0.reverse-aliases.address03.xa.

;; A dangling alias (pointing to a nonexistent node).
2.4.0.0         CNAME   dangling.alias

;; An illegal alias (with more than one CNAME RR).
;; NOTE: The resolver MUST NOT attempt to follow any of the CNAME resource records!
3.4.0.0         CNAME   illegal1.alias
                CNAME   illegal2.alias

;; Queries for the following name must be dropped.
; 4.4.0.0         PTR     ns14.child.address03.xa.

;; Queries for the following name must fail with RCODE SERVFAIL.
; 5.4.0.0         PTR     ns15.child.address03.xa.

illegal1.alias  PTR     ns13.child.address03.xa.
illegal2.alias  PTR     ns13.child.address03.xa.