Changing The DNS
The DNS will point your website to the correct server, just like a telephone number. For a detailed tutorial on this see my post Use Cloudflare DNS Content Delivery Network Easy Tutorial Reliable (a1websitepro.com)
Navigate to your DNS records at our registrar. This will be where you purchased the domain name or perhaps CloudFlare if you change your name servers at your registrar.
There is one major record you want to change. We call this an “A Record”. It will have an IP address that are a bunch of number octates. You need to enter your new IP numbers into that “A Record”. Save it and then you’re done. You may have to wait a couple hours for propagation, but eventually you will see it pointed to your new server.