blog.test.joker.com has no NS records.
NS records for this zone are defined at joker.com.
NS records for this zone are defined at joker.com.
Question and response
Question
dig blog.test.joker.csl.de. NS
Answer
The response has no answer records.
Authority
csl.de. 300 SOA a.ns.nrw.net. hostmaster.joker.com. 2026031132 14400 3600 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0