Preliminary note: our DNS service is down, and I have no access to the website settings; I am just a team member trying to help people who need the website right now.
Four websites share the same IP address. When I type this IP address into my browser, only one website appears.
How I can try to figure out 'numerical' addresses of each website?
Should I try different port numbers such as 188.8.131.52:8080 etc? If yes, which port numbers I should try first?
Thank you very much in advance.
updated: the web server is nginx