Start your MetaTrader 4 Terminal. Then go to Files and open Data Folder, This will lead you to the configuration folder. It will have SRV files (your broker’s MT4 server information).
Open this file with notepad. There may be a pop-up window showing you can’t open the file. If this happens, select the Notepad program from the list of installed programs. This file will show you DNS/IP address entry.