Apex domains cannot have CNAME records.
Question and response
Question
dig ironwebhosting.com. NS
Answer
ironwebhosting.com. 5 NS launch1.spaceship.net.
ironwebhosting.com. 5 NS launch2.spaceship.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0