The command TNSPING can be used to get information about an alias for an Oracle server. Below you can see a screenshot from the command being executed in the command prompt for Windows.
In the command prompt you write: tnsping <the alias of your Oracle server>
TNSPING will return the
|HOST||Showing you the name of the physical host of the Oracle server.|
|PORT||Showing you the port of the Oracle server on the physical host.
1521 is the default port for an Oracle server.