Apex domains cannot have CNAME records.
Question and response
Question
dig telligent.com. NS
Answer
telligent.com. 2 NS ns-1822.awsdns-35.co.uk.
telligent.com. 2 NS ns-518.awsdns-00.net.
telligent.com. 2 NS ns-347.awsdns-43.com.
telligent.com. 2 NS ns-1510.awsdns-60.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0