standard.mask.ad has no NS records.
NS records for this zone are defined at mask.ad.
NS records for this zone are defined at mask.ad.
Question and response
Question
dig standard.mask.ad. NS
Answer
The response has no answer records.
Authority
mask.ad. 1800 SOA ben.ns.cloudflare.com. dns.cloudflare.com. 2397811655 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0