$ dig +trace PTR 6.0.5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.5.f.f.8.d.6.1.1.0.0.2.ip6.arpa.
; <<>> DiG 9.4.1-P1 <<>> +trace PTR 6.0.5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.5.f.f.8.d.6.1.1.0.0.2.ip6.arpa.
;; global options: printcmd
. 508752 IN NS B.ROOT-SERVERS.NET.
. 508752 IN NS C.ROOT-SERVERS.NET.
. 508752 IN NS D.ROOT-SERVERS.NET.
. 508752 IN NS E.ROOT-SERVERS.NET.
. 508752 IN NS F.ROOT-SERVERS.NET.
. 508752 IN NS G.ROOT-SERVERS.NET.
. 508752 IN NS H.ROOT-SERVERS.NET.
. 508752 IN NS I.ROOT-SERVERS.NET.
. 508752 IN NS J.ROOT-SERVERS.NET.
. 508752 IN NS K.ROOT-SERVERS.NET.
. 508752 IN NS L.ROOT-SERVERS.NET.
. 508752 IN NS M.ROOT-SERVERS.NET.
. 508752 IN NS A.ROOT-SERVERS.NET.
;; Received 276 bytes from 10.0.0.1#53(10.0.0.1) in 2 ms
ip6.arpa. 172800 IN NS NS1.APNIC.NET.
ip6.arpa. 172800 IN NS TINNIE.ARIN.NET.
ip6.arpa. 172800 IN NS NS.ICANN.ORG.
ip6.arpa. 172800 IN NS NS-SEC.RIPE.NET.
ip6.arpa. 172800 IN NS NS.LACNIC.NET.
;; Received 219 bytes from 202.12.27.33#53(M.ROOT-SERVERS.NET) in 333 ms
8.d.6.1.1.0.0.2.ip6.arpa. 172800 IN NS ns4.q.p80.net.
8.d.6.1.1.0.0.2.ip6.arpa. 172800 IN NS ns1.q.port80.se.
8.d.6.1.1.0.0.2.ip6.arpa. 172800 IN NS ns2.q.port80.se.
8.d.6.1.1.0.0.2.ip6.arpa. 172800 IN NS ns3.q.p80.net.
;; Received 182 bytes from 200.160.0.7#53(NS.LACNIC.NET) in 312 ms
f.f.8.d.6.1.1.0.0.2.ip6.arpa. 60 IN NS ns1.sixxs.net.
f.f.8.d.6.1.1.0.0.2.ip6.arpa. 60 IN NS ns2.sixxs.net.
f.f.8.d.6.1.1.0.0.2.ip6.arpa. 60 IN NS ns3.sixxs.net.
;; Received 153 bytes from 82.96.2.250#53(ns2.q.port80.se) in 62 ms
2.5.f.f.8.d.6.1.1.0.0.2.ip6.arpa. 604800 IN NS lillestrom.mlmm.no.
;; Received 122 bytes from 2001:7b8:3:1e:290:27ff:fe0c:5c5e#53(ns2.sixxs.net) in 110 ms
6.0.5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.5.f.f.8.d.6.1.1.0.0.2.ip6.arpa. 604800 IN PTR irc.mlmm.no.
2.5.f.f.8.d.6.1.1.0.0.2.ip6.arpa. 604800 IN NS dns.mlmm.no.
;; Received 133 bytes from 84.209.33.221#53(lillestrom.mlmm.no) in 23 ms