s520.v2nets.com has no NS records.
NS records for this zone are defined at v2nets.com.
NS records for this zone are defined at v2nets.com.
Question and response
Question
dig s520.v2nets.com. NS
Answer
The response has no answer records.
Authority
v2nets.com. 1800 SOA rick.ns.cloudflare.com. dns.cloudflare.com. 2395999162 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0