sn.kursifant.com has no NS records.
NS records for this zone are defined at kursifant.com.
NS records for this zone are defined at kursifant.com.
Question and response
Question
dig custom.trysendnow.com. NS
Answer
The response has no answer records.
Authority
trysendnow.com. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1772029717 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0