Question and response
Question
dig mail.comcastspotlight.com. NS
Answer
mail.comcastspotlight.com. 5 CNAME mkto-ab170081.com.
mkto-ab170081.com. 5 NS ns2.mktdns.com.
mkto-ab170081.com. 5 NS ns1.marketo.com.
Authority
The response has no authority records.
Additional
ns1.marketo.com. 5 A 199.15.213.1
ns2.mktdns.com. 5 A 199.15.215.252
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0