Apex domains cannot have CNAME records.
Question and response
Question
dig trusts.cpcnet.com. NS
Answer
trusts.cpcnet.com. 5 NS ns1.hk.linkage.net.
trusts.cpcnet.com. 5 NS ns2.hk.linkage.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0