$ORIGIN 3.11.127.in-addr.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
;;;
21              PTR     ns1.address03.xa.
22              PTR     ns2.address03.xa.

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

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

;; One more for the “happy path”.
32              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.
33              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.
_.34            TXT     "To make the parent node an empty non-terminal"


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

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

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

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

;; Multiple non-matching names.
39              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).
40              CNAME   40.alias
40.alias        PTR     ns10.child.address03.xa.

;; Another good alias, but the target is another zone.
41              CNAME   41.reverse-aliases.address03.xa.

;; A dangling alias (pointing to a nonexistent node).
42              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!
43              CNAME   illegal1.alias
                CNAME   illegal2.alias

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

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

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