KnowMyRouter is a free online router IP address checker website. This website also teaches you about various IP addresses that are used inside of a local area. These IP addresses can include 192.168.1.1, 192.168.10.1, 192.168.100.1, etc,.
These IP addresses are registered by IANA for private use only and you can use these IP addresses to communicate with the connected network device.
The use of these IP addresses are to access the admin console of the router. And by accessing the IP address of the router, you can make lots of changes which can include changing local IP addresses, network connections, block-unblock devices, etc.
We at Know My Router, make it easy for you by sharing a lot of easy step by step guide on accessing your router, your router's username and password, and a lot more things.