FTTX-91.109.239-211.purefibre.net has no NS records.
NS records for this zone are defined at purefibre.net.
NS records for this zone are defined at purefibre.net.
Question and response
Question
dig FTTX-91.109.239-211.purefibre.net. NS
Answer
The response has no answer records.
Authority
purefibre.net. 3600 SOA ns1.onyx.io. dns-admin.katapult.io. 1772709859 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0