My server has the same IP as another?

Ok, so I recently bought a Minecraft server with craftservers.net. I also bought a domain with Name.com and have figured out how to use the domain. But I just found out that my server has the same IP as another, except mine has a port… Is there ANY way to get it? Because whenever I type it in as the IP, it comes up with the other server.

Your router does not come with an IP, you must set it. And you MUST set it to a private IP address which is only visible from your own network. To use the domain you must subscribe t a static public IP address with your ISP. Then you point the domain registrars DNS A, CNAME and PTR records to point to your own public IP. And unless you set up your own private DNS server as well you will still need to access your own server by its' private IP from inside the network.