This is consistent with dns64 being configured with a prefix of 2607:f0b0:f::/96. Have you been playing around with dns64?
> On 23 Jul 2025, at 15:19, Michael Richardson <m...@sandelman.ca> wrote: > > > obiwan-[~](3.3.8) mcr 10027 %dig @nic.sandelman.ca -x 2607:f0b0:f::babe:f00d > ptr > ;; 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. 600 > IN CNAME 13.240.190.186.in-addr.arpa. > 13.240.190.186.in-addr.arpa. 86315 IN PTR 186-190-240-13.e-commercepark.com. -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org -- Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users