Nameserver

Nameservers are the actual machines that store and serve DNS records. Two flavors:

• Authoritative nameservers — hold the actual data for specific domains. ns1.modusdom.com is authoritative for the modusdom.com zone.
• Recursive resolvers — don't hold their own data; they just ask authoritative nameservers on behalf of clients and cache the answers. Your home router runs a tiny one; Cloudflare's 1.1.1.1 and Google's 8.8.8.8 are big public ones.

Every domain needs at least two authoritative nameservers (ICANN requires this for redundancy). They're typically operated either by your registrar (e.g., ns1.modusdom.com) or by a third-party DNS provider (Cloudflare's greta.ns.cloudflare.com, AWS Route 53, etc.).

To switch nameservers: go to your registrar's control panel, change the NS records at the registry level. Within a few hours, queries route to the new nameservers globally. See propagation for what happens in the meantime.

Modusdom's default nameservers are ns1.modusdom.com and ns2.modusdom.com. Use them if you want to manage DNS from your Modusdom account dashboard; switch to a third party if you want Cloudflare's edge or a different feature set.