Apex domains cannot have CNAME records.
Question and response
Question
dig artewan.net. NS
Answer
artewan.net. 1 NS nsa.bookmyname.com.
artewan.net. 1 NS nsc.bookmyname.com.
artewan.net. 1 NS nsb.bookmyname.com.
Authority
The response has no authority records.
Additional
nsa.bookmyname.com. 2 A 195.154.224.11
nsb.bookmyname.com. 2 A 195.154.224.12
nsc.bookmyname.com. 2 A 195.154.234.38
nsa.bookmyname.com. 2 AAAA 2001:bc8:702:70:0:0:0:b
nsb.bookmyname.com. 2 AAAA 2001:bc8:702:70:0:0:0:c
nsc.bookmyname.com. 2 AAAA 2001:bc8:1203:215:0:0:0:26
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0