$ dig ns bbx.2ch.net. +trace

; <<>> DiG 9.6.-ESV-R5-P1 <<>> ns bbx.2ch.net. +trace
;; global options: +cmd
. 12356 IN NS f.root-servers.net.
. 12356 IN NS m.root-servers.net.
. 12356 IN NS a.root-servers.net.
. 12356 IN NS j.root-servers.net.
. 12356 IN NS l.root-servers.net.
. 12356 IN NS g.root-servers.net.
. 12356 IN NS k.root-servers.net.
. 12356 IN NS c.root-servers.net.
. 12356 IN NS d.root-servers.net.
. 12356 IN NS b.root-servers.net.
. 12356 IN NS h.root-servers.net.
. 12356 IN NS i.root-servers.net.
. 12356 IN NS e.root-servers.net.
;; Received 228 bytes from 206.223.144.254#53(206.223.144.254) in 3 ms

net. 172800 IN NS h.gtld-servers.net.
net. 172800 IN NS i.gtld-servers.net.
net. 172800 IN NS f.gtld-servers.net.
net. 172800 IN NS b.gtld-servers.net.
net. 172800 IN NS d.gtld-servers.net.
net. 172800 IN NS k.gtld-servers.net.
net. 172800 IN NS e.gtld-servers.net.
net. 172800 IN NS g.gtld-servers.net.
net. 172800 IN NS j.gtld-servers.net.
net. 172800 IN NS l.gtld-servers.net.
net. 172800 IN NS a.gtld-servers.net.
net. 172800 IN NS m.gtld-servers.net.
net. 172800 IN NS c.gtld-servers.net.
;; Received 498 bytes from 192.36.148.17#53(192.36.148.17) in 158 ms

2ch.net. 172800 IN NS ns1.nttec.com.
2ch.net. 172800 IN NS ns2.nttec.com.
;; Received 106 bytes from 192.41.162.30#53(192.41.162.30) in 73 ms

bbx.2ch.net. 300 IN NS a.ns.bbx.2ch.net.
;; Received 64 bytes from 206.223.146.254#53(206.223.146.254) in 15134 ms

;; Received 29 bytes from 206.223.151.207#53(206.223.151.207) in 0 ms