Where is the use of 1921680254 ??
The default IP address for the router is used for login to the device and main purpose of the default IP address, username and password are used mainly for this reason.
IP used to login to the device to access router control panel, access router settings, access router features, access router information.
Um, does your router use 192.168.0.254...
see > https://community.norton.com/en/comment/6984931#