nnetworks.jp.
Question and response
Question
dig 252.192-255.50.106.59.in-addr.arpa. PTR
Answer
252.192-255.50.106.59.in-addr.arpa. 86400 PTR nnetworks.jp.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0