As I understand it, if you want to use domains internally for your home ("home") network, there's some DNS support for "home.arpa"[0].

0 - https://www.rfc-editor.org/rfc/rfc8375.html

I've been using .lan, referenced in rfc6762[1] as a good alternative to the multicast .local

> We do not recommend use of unregistered top-level domains at all, but should network operators decide to do this, the following top-level domains have been used on private internal networks without the problems caused by trying to reuse ".local." for this purpose:

      .intranet.
      .internal.
      .private.
      .corp.
      .home.
      .lan.