Question and response
Question
dig ns1.sendgrig.net. NS
Answer
ns1.sendgrig.net. 5 CNAME sendgrig.net.
sendgrig.net. 5 NS ns1.sendgrig.net.
sendgrig.net. 5 NS ns2.sendgrig.net.
Authority
The response has no authority records.
Additional
ns1.sendgrig.net. 5 A 142.44.211.148
ns2.sendgrig.net. 5 A 45.82.66.140
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0