MoinQ:

1. DNS/Cloudflare/custom_nameservers

Cloudflare Support DNS Custom Nameservers

https://support.cloudflare.com/hc/en-us/articles/200169006-Setting-up-Custom-Nameservers-at-Cloudflare

Setting up Custom Nameservers at Cloudflare

With Custom Nameservers, a domain can use Cloudflare DNS without using the host names of Cloudflare-assigned Nameservers.


Overview

Cloudflare domains on Business or Enterprise plans can set Custom Nameservers at Cloudflare.