ns9.strongns.net has no NS records.
NS records for this zone are defined at strongns.net.
NS records for this zone are defined at strongns.net.
Question and response
Question
dig ns9.strongns.net. NS
Answer
The response has no answer records.
Authority
strongns.net. 3601 SOA freedns1.registrar-servers.com. hostmaster.registrar-servers.com. 1580224564 43200 3600 604800 3601
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0