mail2.cleanport.nl has no NS records.
NS records for this zone are defined at cleanport.nl.
NS records for this zone are defined at cleanport.nl.
Question and response
Question
dig mail2.cleanport.nl. NS
Answer
The response has no answer records.
Authority
cleanport.nl. 86400 SOA edns109.ultradns.com. domains.nortonlifelock.com. 2022032903 21600 7200 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0