mail.il0.ch has no NS records.
NS records for this zone are defined at il0.ch.
NS records for this zone are defined at il0.ch.
Question and response
Question
dig mail.il0.ch. NS
Answer
The response has no answer records.
Authority
il0.ch. 1800 SOA ns1.fima-hosting.ch. helpdesk.fima.ch. 2020093793 21600 10800 1209600 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0