mv-gw.valis.com has no CNAME records.
Question and response
Question
dig mv-gw.valis.com. NS
Answer
The response has no answer records.
Authority
Valis.COM. 10800 SOA Valis.COM. psi.Valis.COM. 2024030601 10800 3600 2492000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0