sv.as266400.net has no NS records.
NS records for this zone are defined at as266400.net.
NS records for this zone are defined at as266400.net.
Question and response
Question
dig sv.as266400.net. NS
Answer
The response has no answer records.
Authority
as266400.net. 1800 SOA asa.ns.cloudflare.com. dns.cloudflare.com. 2397310022 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0