247.224-255.76.18.185.in-addr.arpa has no NS records.
NS records for this zone are defined at 224-255.76.18.185.in-addr.arpa.
NS records for this zone are defined at 224-255.76.18.185.in-addr.arpa.
Question and response
Question
dig 247.224-255.76.18.185.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
224-255.76.18.185.in-addr.arpa. 86400 SOA dns1.ficolo.net. hostmaster.ficolo.net. 2020051900 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0