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You can follow our External DNS configure mentioned here:
That’s section one:
Type
Name
Value
A
@
75.2.60.5
CNAME
www
mysite.netlify.app
You should point the A Record for hemasblomster.dk to 75.2.60.5 and for www.hemasblomster.dk you would create a CNAME Record that points to hemasblomster.netlify.app.