mail.entorno.cat has no NS records.
NS records for this zone are defined at entorno.cat.
NS records for this zone are defined at entorno.cat.
Question and response
Question
dig mail.entorno.cat. NS
Answer
The response has no answer records.
Authority
entorno.cat. 86400 SOA ns1-a.entorno.com. hostmaster.eurodns.com. 2026021601 43200 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0