Apex domains cannot have CNAME records.
Question and response
Question
dig concursolutions.com. NS
Answer
concursolutions.com. 5 NS a1-111.akam.net.
concursolutions.com. 5 NS a5-66.akam.net.
concursolutions.com. 5 NS a28-65.akam.net.
concursolutions.com. 5 NS a18-64.akam.net.
concursolutions.com. 5 NS a10-66.akam.net.
concursolutions.com. 5 NS a13-67.akam.net.
Authority
The response has no authority records.
Additional
a5-66.akam.net. 1 A 95.100.168.66
a1-111.akam.net. 1 A 193.108.91.111
a10-66.akam.net. 1 A 96.7.50.66
a13-67.akam.net. 1 A 2.22.230.67
a18-64.akam.net. 1 A 95.101.36.64
a28-65.akam.net. 1 A 95.100.173.65
a5-66.akam.net. 1 AAAA 2600:1480:b000:0:0:0:0:42
a1-111.akam.net. 1 AAAA 2600:1401:2:0:0:0:0:6f
a10-66.akam.net. 1 AAAA 2600:1480:d000:0:0:0:0:42
a13-67.akam.net. 1 AAAA 2600:1480:800:0:0:0:0:43
a18-64.akam.net. 1 AAAA 2600:1480:4800:0:0:0:0:40
a28-65.akam.net. 1 AAAA 2600:1480:d800:0:0:0:0:41
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0