5.40.210.221.static.user.ono.com has no NS records.
NS records for this zone are defined at user.ono.com.
NS records for this zone are defined at user.ono.com.
Question and response
Question
dig 5.40.210.221.static.user.ono.com. NS
Answer
The response has no answer records.
Authority
user.ono.com. 3600 SOA dns01.ono.com. administrador.ono.es. 2023041101 3600 7200 3600000 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0