RFC 2317:Classless IN-ADDR.ARPA delegation
RFC-Ref

ORIGIN


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... $ORIGIN 2.0.192.in-addr.arpa. ; 1 PTR host1.A.domain ...


... $ORIGIN 2.0.192.in-addr.arpa. @ IN SOA my-ns.my.domain ...
... CNAME 195.192/26.2.0.192.in-addr.arpa. $ORIGIN 0/25.2.0.192.in-addr.arpa. @ IN SOA ns.A.domain ...
... domain. $ORIGIN 128/26.2.0.192.in-addr.arpa. @ IN SOA ns.B.domain ...
... domain. $ORIGIN 192/26.2.0.192.in-addr.arpa. @ IN SOA ns.C.domain ...
... $ORIGIN 2.0.192.in-addr.arpa. 129 CNAME 129.128/26.2.0.192.in-addr.arpa. ...
... $ORIGIN 2.0.192.in-addr.arpa. 129 CNAME 129.128/26 ...


... $ORIGIN 2.0.192.in-addr.arpa. @ IN SOA my-ns.my.domain ...
... ; $ORIGIN A.domain. @ IN ...
... $ORIGIN 2.0.192.in-addr.arpa. @ SOA my-ns.my.domain. hostmaster.my.domain ...
... domain. $ORIGIN A.domain. @ SOA my-ns.A.domain ...



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