If you want to know where your website is physically hosted. You may need to inquire with your web host. Your web host would know what datacenter location and the datacenter facility that your website is physically residing on. You may also do a traceroute from your computer to your website. The best way thou is to just ask your web host.
You can start by looking at your web host’s website and see if they mention where the datacenter location is or the frequently ask questions page. If after checking out your web host’s site and the FAQ’s and don’t find the answer. You can call your web host or open a trouble ticket and ask your web host where the datacenter location is.