$ dig +trace +nodnssec 3.9.2.2.3.2.1.2.4.e164.arpa
; <<>> DiG <<>> +trace +nodnssec 3.9.2.2.3.2.1.2.4.e164.arpa
;; global options: +cmd
. 516265 IN NS a.root-servers.net.
. 516265 IN NS b.root-servers.net.
. 516265 IN NS c.root-servers.net.
. 516265 IN NS d.root-servers.net.
. 516265 IN NS e.root-servers.net.
. 516265 IN NS f.root-servers.net.
. 516265 IN NS g.root-servers.net.
. 516265 IN NS h.root-servers.net.
. 516265 IN NS i.root-servers.net.
. 516265 IN NS j.root-servers.net.
. 516265 IN NS k.root-servers.net.
. 516265 IN NS l.root-servers.net.
. 516265 IN NS m.root-servers.net.
;; Received 239 bytes from 2606:4700:4700::1111#53(2606:4700:4700::1111) in 1 ms
e164.arpa. 172800 IN NS ns3.lacnic.net.
e164.arpa. 172800 IN NS ns3.afrinic.net.
e164.arpa. 172800 IN NS ns4.apnic.net.
e164.arpa. 172800 IN NS pri.authdns.ripe.net.
e164.arpa. 172800 IN NS rirns.arin.net.
;; Received 190 bytes from 2801:1b8:10::b#53(b.root-servers.net) in 28 ms
1.2.4.e164.arpa. 86400 IN NS sun.uakom.sk.
1.2.4.e164.arpa. 86400 IN NS c.ns.tuke.sk.
1.2.4.e164.arpa. 86400 IN NS ns.cvt.stuba.sk.
;; Received 152 bytes from 204.61.216.100#53(ns3.afrinic.net) in 0 ms
3.9.2.2.3.2.1.2.4.e164.arpa. 3600 IN NS ns.sav.sk.
3.9.2.2.3.2.1.2.4.e164.arpa. 3600 IN NS auriga.ta3.sk.
3.9.2.2.3.2.1.2.4.e164.arpa. 3600 IN NS savba.svba.sk.
;; Received 129 bytes from 2001:4118:10:100::11#53(ns.cvt.stuba.sk) in 118 ms
3.9.2.2.3.2.1.2.4.e164.arpa. 300 IN A 23.140.20.13
3.9.2.2.3.2.1.2.4.e164.arpa. 300 IN NS savba.svba.sk.
;; Received 153 bytes from 23.140.20.53#53(savba.svba.sk) in 1 ms
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