Look for 'dynamic DNS' providers. Bascially you have software on your server which will check if it still has the same public IP address and if not it will tell

Look for 'dynamic DNS' providers. Bascially you have software on your server which will check if it still has the same public IP address and if not it will tell the DNS provider to update the mapping. https://dyn.com/ https://dyn.com/ used to be market leader, well, when it was free. You should still be able to find some free providers https://www.maketecheasier.com/best-dynamic-dns-providers/ https://www.maketecheasier.com/best-dynamic-dns-providers/ (not affiliated).