sub120.purecarenet.com has no NS records.
NS records for this zone are defined at purecarenet.com.
NS records for this zone are defined at purecarenet.com.
Question and response
Question
dig sub120.purecarenet.com. NS
Answer
The response has no answer records.
Authority
purecarenet.com. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1773584801 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0