If I understand you correctly, you are trying to host a website in your www subdomain at a server that is located at port 25912 at the IP
x.x.x.x. If so, please try to acquire a hosting provider that can provide you with default ports.
You can however, point your www subdomain to the IP address specified. But, you’ll need to access it through
https://www.coverfactions.net:25912 instead of
https://www.coverfactions.net and you’ll need to grey-cloud it.
There was a proposal to support SRV for HTTP traffic, which has expired for 3 years, but as far as I know, no major browser has implemented it yet due to various reason from it negatively impacting latency, the proposal has not been standardize and complex integration. A browser had even denied it without even explaining why they denied the request.
So, TL:DR, unless you want to open your website through
https://www.coverfactions.net:25912 with the trailing port number, get a hosting provider that allows defaults port.