2.0-27.204.246.77.in-addr.arpa has no NS records.
NS records for this zone are defined at 0-27.204.246.77.in-addr.arpa.
NS records for this zone are defined at 0-27.204.246.77.in-addr.arpa.
Question and response
Question
dig 2.0-27.204.246.77.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
0-27.204.246.77.in-addr.arpa. 3600 SOA foo-ns.foobar.fi. hostmaster.foobar.fi. 1764170504 28800 3600 864000 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0