Apex domains cannot have CNAME records.
Question and response
Question
dig ip.webhost1.net. NS
Answer
ip.webhost1.net. 5 NS ns4.webhost1.org.
ip.webhost1.net. 5 NS ns2.webhost1.com.
ip.webhost1.net. 5 NS ns1.webhost1.com.
ip.webhost1.net. 5 NS ns3.webhost1.org.
Authority
The response has no authority records.
Additional
ns1.webhost1.com. 5 A 185.179.188.2
ns2.webhost1.com. 5 A 185.179.189.202
ns3.webhost1.org. 5 A 185.179.188.2
ns4.webhost1.org. 5 A 185.179.189.202
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0