Question and response
Question
dig webmail.optonline.net. PTR
Answer
The response has no answer records.
Authority
optonline.net. 900 SOA authns1.cv.net. hostmaster.cv.net. 85417 7200 600 604800 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0