Is there a universal stub for the site?

Question

Domain Name System

Hello. For example, when you need to do work on a website or a DDoS attack, you want to transfer the domain to a stub on another server, but you are too lazy to do it. So, are there such IPs, services where you can send your domain (A-record) for the duration of the technical work of the site. And there will be some kind of stub hanging.

Answer 1

127.0.0.1
Free and most importantly - 100% working. :)
The truth is not a very beautiful stub, something about a connection attempt and a 404 code is written.
Stub github.io via CNAME .