ns1.beepweb.net.
Question and response
Question
dig 251.192-255.83.129.213.in-addr.arpa. PTR
Answer
251.192-255.83.129.213.in-addr.arpa. 43200 PTR ns1.beepweb.net.
Authority
192-255.83.129.213.in-addr.arpa. 43200 NS ns0.beepweb.net.
192-255.83.129.213.in-addr.arpa. 43200 NS ns1.beepweb.net.
Additional
ns0.beepweb.net. 1800 A 109.73.123.38
ns1.beepweb.net. 1800 A 213.129.83.251
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0