host1.cntech.net has no CNAME records.
Question and response
Question
dig host1.cntech.net. NS
Answer
The response has no answer records.
Authority
cntech.net. 341 SOA host1.cntech.net. webmaster.cntech.net. 2022012706 10800 1800 1209600 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0