spamfiltering.com CNAME records

CNAME Canonical name
Apex domains cannot have CNAME records.

Question and response

Question

dig spamfiltering.com. NS

Answer

spamfiltering.com. 1 NS ns1.unitedhosting.co.uk. spamfiltering.com. 1 NS ns3.unitedhosting.co.uk. spamfiltering.com. 1 NS ns2.unitedhosting.co.uk.

Authority

The response has no authority records.

Additional

. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0