gr.vpnunlimitedapp.com has no NS records.
NS records for this zone are defined at vpnunlimitedapp.com.
NS records for this zone are defined at vpnunlimitedapp.com.
Question and response
Question
dig gr.vpnunlimitedapp.com. NS
Answer
The response has no answer records.
Authority
vpnunlimitedapp.com. 1800 SOA hope.ns.cloudflare.com. dns.cloudflare.com. 2398286294 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0