On Wed, 23 Jul 2025, Michael Richardson wrote:
When I ask from the IETF123 network:
;; SERVER: 31.130.231.0#53(31.130.231.0) (UDP)
;; ANSWER SECTION:
d.0.0.f.e.b.a.b.0.0.0.0.0.0.0.0.0.0.0.0.f.0.0.0.0.b.0.f.7.0.6.2.ip6.arpa. 7200
IN PTR nic.sandelman.ca.
which is entirely correct.
Probably 31.130.231.0 got the answer from @sns.cooperix.net. (instead of
@nic.sandelman.ca.)
...
nic.sandelman.ca.
is also authoritatively serving:
0.0.0.0.0.0.0.0.0.0.0.0.f.0.0.0.0.b.0.f.7.0.6.2.ip6.arpa. 86400 IN SOA .
. 0 28800 7200 604800 86400
0.0.0.0.0.0.0.0.0.0.0.0.f.0.0.0.0.b.0.f.7.0.6.2.ip6.arpa. 0 IN NS .
That may give you a clue.
You may have two zones serving the same.
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