mail.ibs-bw.de has no NS records.
NS records for this zone are defined at ibs-bw.de.
NS records for this zone are defined at ibs-bw.de.
Question and response
Question
dig mail.ibs-bw.de. NS
Answer
The response has no answer records.
Authority
ibs-bw.de. 10800 SOA dns6.uni-tuebingen.de. hostmaster.uni-tuebingen.de. 307 21600 1800 2419200 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0