What is

The manufacturers of broadband routers and other networking elements allow the end users to configure the devices through their web browsers. For this, the devices are given a default private IP Address, which allow the users to access the device after giving the default username and password for the device.

Different vendors use different private IP Address, but they usually begin with the common starting 192.168. The device can be accesses and configured by giving the default username and password. You can also change the password as per your liking. In case you forget the the changed password of the router, you can restore the default settings, including the router password, by using a hardware rest button, generally provided on the body of the router. Password List

Here is a complete list of many of the popular brands of routers and networking elements alongwith some of their most popular models. You can use the list to know the default username and password of your favorite router.