Apex domains cannot have CNAME records.
Question and response
Question
dig rcintl.com. NS
Answer
rcintl.com. 5 NS launch2.spaceship.net.
rcintl.com. 5 NS launch1.spaceship.net.
Authority
The response has no authority records.
Additional
launch1.spaceship.net. 4 A 162.159.26.38
launch2.spaceship.net. 4 A 162.159.27.32
launch1.spaceship.net. 4 AAAA 2400:cb00:2049:1:0:0:a29f:1a26
launch2.spaceship.net. 4 AAAA 2400:cb00:2049:1:0:0:a29f:1b20
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0