spf.spamcluster.nl has no NS records.
NS records for this zone are defined at spamcluster.nl.
NS records for this zone are defined at spamcluster.nl.
Question and response
Question
dig spf.spamcluster.nl. NS
Answer
The response has no answer records.
Authority
spamcluster.nl. 1000 SOA intention.ns01.nl. hostmaster.intention.nl. 2026033331 3600 14400 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0