17.206.51.38.in-addr.arpa has no NS records.
NS records for this zone are defined at 206.51.38.in-addr.arpa.
NS records for this zone are defined at 206.51.38.in-addr.arpa.
Question and response
Question
dig 17.206.51.38.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
206.51.38.in-addr.arpa. 38400 SOA ns1.tecnovenca.net. noc.tecnovenca.net. 1658591066 10800 3600 604800 38400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0