Apex domains cannot have CNAME records.
Question and response
Question
dig weplugg.com. NS
Answer
weplugg.com. 5 NS ns55.superdnssite.com.
weplugg.com. 5 NS ns56.superdnssite.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0