Question and response
Question
dig edns.registrar-servers.com. NS
Answer
edns.registrar-servers.com. 5 CNAME edns4.ultradns.com.
Authority
ultradns.com. 60 SOA pdns196.ultradns.net. domains.vercara.com. 2017038255 10800 3600 86400 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0