spf.solcon.nl has no NS records.
NS records for this zone are defined at solcon.nl.
NS records for this zone are defined at solcon.nl.
Question and response
Question
dig spf.solcon.nl. NS
Answer
The response has no answer records.
Authority
solcon.nl. 3600 SOA nsauth01.solcon.nl. postmaster.solcon.nl. 2026025330 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0