cloud.vcosa.com has no NS records.
NS records for this zone are defined at vcosa.com.
NS records for this zone are defined at vcosa.com.
Question and response
Question
dig cloud.vcosa.com. NS
Answer
The response has no answer records.
Authority
vcosa.com. 86400 SOA vcosa.com. root.vcosa.com. 2022101001 28800 7200 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0