According to https://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xhtml
147/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry http://rdap.arin.net/registry LEGACY > $ dig 147.in-addr.arpa. ns ; <<>> DiG 9.16.1-Ubuntu <<>> 147.in-addr.arpa. ns ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 20223 ;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 65494 ;; QUESTION SECTION: ;147.in-addr.arpa. IN NS ;; ANSWER SECTION: 147.in-addr.arpa. 86400 IN NS r.arin.net. 147.in-addr.arpa. 86400 IN NS u.arin.net. 147.in-addr.arpa. 86400 IN NS x.arin.net. 147.in-addr.arpa. 86400 IN NS y.arin.net. 147.in-addr.arpa. 86400 IN NS z.arin.net. 147.in-addr.arpa. 86400 IN NS arin.authdns.ripe.net. ;; Query time: 75 msec ;; SERVER: 127.0.0.53#53(127.0.0.53) ;; WHEN: Thu Oct 29 15:02:58 PDT 2020 ;; MSG SIZE rcvd: 165 >another example $ dig 196.in-addr.arpa. ns +short ns1.afrinic.net. ns2.afrinic.net. ns3.lacnic.net. ns3.afrinic.net. ns4.apnic.net. tinnie.arin.net. afrinic.authdns.ripe.net. For legacy /8 that exists today in multiple RIRs, what is the process to make sure rDNS gets delegated correctly and avoid split views? Is there some mechanism to sync the zone across RIRs? How long does it typically take for this type of reverse delegation update to get reflected in DNS zone? When I created a domain object for 208.75.147.in-addr.arpa., it didn't show up in DNS until the next day. Yang
