What is the definition of a custom hostname? I believe it is For example, if I have the domain name example.com, I may construct a custom hostname like ns1.example.com
It would have been wonderful if Cloudflare had provided a little more information about what it is, because I’m not sure I understand, so I’m asking here to make sure I’m on the right track.
Custom hostnames is unrelated to managing your own domain’s DNS - the intention is for SaaS platforms where you can let a customer setup app.customer.com to point to your infrastructure.
so using this technic i can basically create custom nameservers and point it to a server where i host websites or to the Cloudflare pages server etc. correct?
I’m not entirely sure I follow - this isn’t related to your domain’s own records.
Custom hostnames is exclusively for having other domains (that you don’t control, such as your clients) being able to point a record at an origin of yours & provision a SSL certificate.
SSL for SaaS allows you to extend the security and performance benefits of Cloudflare’s network to your customers via their own custom or vanity domains.
For example, a customer may want to use their vanity domain app.customer.com to point to an application hosted on your Cloudflare zone service.saas.com .
Unless you’re running a SaaS application, it’s unlikely to be something you use.