Question and response
Question
dig smtp1.nextlevelinternet.com. PTR
Answer
The response has no answer records.
Authority
nextlevelinternet.com. 1800 SOA auth1.nextlevelinternet.com. dns.nextlevelinternet.com. 2025070901 10800 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0