Apex domains cannot have CNAME records.
Question and response
Question
dig cld.me. NS
Answer
cld.me. 4 NS dns10.pointhq.com.
cld.me. 4 NS dns12.pointhq.com.
cld.me. 4 NS dns9.pointhq.com.
cld.me. 4 NS dns11.pointhq.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0