Apex domains cannot have CNAME records.
Question and response
Question
dig qvantel.com. NS
Answer
qvantel.com. 5 NS ns-1098.awsdns-09.org.
qvantel.com. 5 NS ns-541.awsdns-03.net.
qvantel.com. 5 NS ns-451.awsdns-56.com.
qvantel.com. 5 NS ns-2045.awsdns-63.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0