Apex domains cannot have CNAME records.
Question and response
Question
dig 26dns.com. NS
Answer
26dns.com. 5 NS ns2.26dns.com.
26dns.com. 5 NS ns1.26dns.com.
Authority
The response has no authority records.
Additional
ns1.26dns.com. 5 A 67.203.0.106
ns2.26dns.com. 5 A 67.203.0.107
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0