reply.calmlab.org PTR records

PTR
2m
undefined.hostname.localhost.

Question and response

Question

dig reply.calmlab.org. PTR

Answer

reply.calmlab.org. 120 PTR undefined.hostname.localhost.

Authority

. 120 NS localhost.

Additional

. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0