@girish ok, understood

I have several domains on cloudflare pointing to the ip of my old server,

To which ip do I have to redirect each app I have?

for example new1.myserver.com to cloudtron base ip?
new2.myserver.com to where do I point it?

I have not understood this very well

I mean, how do I point several domains to an ip and only the site is seen, without damaging the parent site?
Thanks