Question and response
Question
dig a.subnet.rcn.com. DS
Answer
The response has no answer records.
Authority
subnet.rcn.com. 86400 SOA master.dns.rcn.net. hostmaster.rcn.com. 2017092502 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0