sv01.bionic.org has no CNAME records.
Question and response
Question
dig sv01.bionic.org. NS
Answer
The response has no answer records.
Authority
bionic.org. 6343 SOA bionic.org. root.securenetwork.de. 2016022239 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0