On 25/01/2019 08:54, Matthias Cramer wrote:
You cant ask your dns directly, it only knows about the zone
118-31.82.119.85.in-addr.arpa.
So you would need do do:
dig 118.18-31.82.119.85.in-addr.arpa ptr @dnsip
to get a correct result you have to ask the dns at the provider and there you
get back a cname pointing to your entry,.
Yes, the "delegation" is a magic CNAME record:
$ dig @8.8.8.8 +trace -x 85.119.82.118
...
118.82.119.85.in-addr.arpa. 86400 IN CNAME
118.118-32.82.119.85.in-addr.arpa.
118-32.82.119.85.in-addr.arpa. 86400 IN NS ns2.abominable.org.uk.
118-32.82.119.85.in-addr.arpa. 86400 IN NS ns1.abominable.org.uk.
And therefore *in this particular example* you create the zone
"118-32.82.119.85.in-addr.arpa" and create PTR record "118" within it.
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