Question and response
Question
dig iberostar.ivcert.net. NS
Answer
iberostar.ivcert.net. 5 CNAME www.ivcert.net.
Authority
ivcert.net. 122 SOA ns1.ivnosys.net. sistemas.ivnosys.com. 1770886836 7200 1800 1209600 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0