Most devices with a web interface work on the standard HTTP port. Try these first:
192.168.1.100 is another private IP address that falls within the same subnet as 192.168.1.1 . Routers with a DHCP (Dynamic Host Configuration Protocol) server automatically assign IPs from a pool – often starting from 192.168.1.100 or 192.168.1.2 and going up to 192.168.1.254 . 192.168 1.100 1