What is the default IP address of my Rockspace range extender? Let me first consider that your Rockspace router has its respective default IP settings in it. If you haven’t changed or modified the IP address of your router yet, then there is an IP address on the label of the router which is currently accessible through the web browser of your device. Although, the default IP of the Rockspace WIFI Extender setup is http://192.168.1.1 or you can simply use it as 192.168.1.1.