sv01.bionic.org has no NS records.
NS records for this zone are defined at bionic.org.
NS records for this zone are defined at bionic.org.
Question and response
Question
dig sv01.bionic.org. NS
Answer
The response has no answer records.
Authority
bionic.org. 86400 SOA bionic.org. root.securenetwork.de. 2016022239 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0