sendgrig.net CNAME records

CNAME Canonical name
Apex domains cannot have CNAME records.

Question and response

Question

dig sendgrig.net. NS

Answer

sendgrig.net. 1 NS ns2.sendgrig.net. sendgrig.net. 1 NS ns1.sendgrig.net.

Authority

The response has no authority records.

Additional

ns1.sendgrig.net. 1 A 142.44.211.148 ns2.sendgrig.net. 1 A 45.82.66.140 . 0 OPT ; payload 1232, xrcode 0, version 0, flags 0