dns.thisalabs.com has no NS records.
NS records for this zone are defined at thisalabs.com.
NS records for this zone are defined at thisalabs.com.
Question and response
Question
dig dns.thisalabs.com. NS
Answer
The response has no answer records.
Authority
thisalabs.com. 3600 SOA dns.thisalabs.com. hostmaster.thisalabs.com. 1212174250 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0