mimecast.com CNAME records

CNAME Canonical name
Apex domains cannot have CNAME records.

Question and response

Question

dig mimecast.com. NS

Answer

mimecast.com. 5 NS dns02.mimecast.net. mimecast.com. 5 NS dns03.mimecast.net. mimecast.com. 5 NS dns04.mimecast.net. mimecast.com. 5 NS dns01.mimecast.net.

Authority

The response has no authority records.

Additional

dns01.mimecast.net. 1 A 185.58.87.12 dns02.mimecast.net. 1 A 205.139.110.125 dns03.mimecast.net. 1 A 195.130.217.24 dns04.mimecast.net. 1 A 170.10.128.103 . 0 OPT ; payload 1232, xrcode 0, version 0, flags 0