The .nl zone has a DS record for neb.nl. Your name servers do not serve DNSSEC for neb.nl. This makes your domain go Bogus on any name server that validates DNSSEC.
Tell your registrar (Metaregistrar, which you may or may not know as Mijndomein) to remove the DS for neb.nl.
See http://dnsviz.net/d/neb.nl/XIGlsw/dnssec/ for a problem analysis from a few minutes ago.
Kind regards,
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Peter van Dijk
PowerDNS.COM BV - https://www.powerdns.com/
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