blackhole.as112.arpa has no NS records.
NS records for this zone are defined at as112.arpa.
NS records for this zone are defined at as112.arpa.
Question and response
Question
dig blackhole.as112.arpa. NS
Answer
The response has no answer records.
Authority
as112.arpa. 3600 SOA sns.dns.icann.org. noc.dns.icann.org. 2022091723 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0