is a default IP address
for a few models of home broadband routers
Using 192.168.100.1 to Connect to a Router
If a router is using 192.168.100.1 on the local network, you can log into its console by pointing a Web browser to
192.168.100.1 is a private IPv4 network address, meaning that you cannot connect to a router from outside the home network using this address. It is for use by administrators within the local area network (LAN)
Administrators can easily change a home router's addresses from some other default to 192.168.100.1 if they prefer to use this number. Some people do that as they find it easier to remember than some other numbers, but otherwise it provides no particular benefit over other address choices.
Using 192.168.100.1 On Local Clients
An administrator can also choose to assign 192.168.100.1 to a different device on the LAN other than the router. In this scenario - called static IP address
assignment, the router's network mask subnet mask
) may also need to be changed (typically to 255.255.0.0) in order for the local subnet to include this address.