tld2.eduroam.de.
Question and response
Question
dig 138.128-28.75.174.193.in-addr.arpa. PTR
Answer
138.128-28.75.174.193.in-addr.arpa. 86400 PTR tld2.eduroam.de.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0