Nameserver

A nameserver (NS) is the server responsible for storing and serving the DNS records for your domain. When someone looks up your domain, the DNS system eventually asks your nameservers for the answer. Your domain registrar lets you set which nameservers to use: your registrar's nameservers, your hosting provider's, or a third-party like Cloudflare. If your nameservers are down or misconfigured, your entire domain becomes unreachable. Most domains use at least two nameservers for redundancy.