sj.printableprek.com has no NS records.
NS records for this zone are defined at printableprek.com.
NS records for this zone are defined at printableprek.com.
Question and response
Question
dig sj.printableprek.com. NS
Answer
The response has no answer records.
Authority
printableprek.com. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1761302939 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0