spf.hix.nl has no NS records.
NS records for this zone are defined at hix.nl.
NS records for this zone are defined at hix.nl.
Question and response
Question
dig spf.hix.nl. NS
Answer
The response has no answer records.
Authority
hix.nl. 900 SOA ns1.hix.nl. support.hix.nl. 2026022514 10800 3600 604800 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0