Let's see all these methods one by one.
Find Router's IP address using command promptYou can easily find router's IP address using any of these two commands on Windows.
Type the following command on command prompt:-
ipconfigNow you can see your router's IP address in front of "Default Gateway".
You can also run traceroute command
tracert www.thegeekinfo.comThe first hop is your IP address of your router. Take a look at screenshots for help.
This method works great for Windows users but if you are Mac user and want to get IP address of your router use terminal app and run following command:-
route -n get defaultThe "Default Gateway" is your IP address for the router's setup page.
If above methods don't work for you, then you can reset the router from a physical button on your router and find default IP address printed on the back of the router.