voipoperator.nl has no A records.
voipoperator.nl has no AAAA records.
Apex domains cannot have CNAME records.
Microsoft
Domain verification
MS=ms29958097
3e4dac6daee7a289437d4ad55f77b7e4d899337cb9ca2e04cc6093b076bfc1f2
liz.ns.cloudflare.com
Cloudflare
sri.ns.cloudflare.com
Cloudflare
Zone apex
Start of authority
Email
Serial
2396920423
Refresh
2h 46m 40s
Retry
40m
Expire
7d
Negative cache TTL
30m