ToolBox -
Router Make Router Address Username Password
Netgear 192.168.0.1 admin password
Linksys 192.168.1.1 admin admin
Belkin PlayMax 192.168.2.1 n/a Leave blank
Belkin 192.168.2.1 n/a Leave blank
Thompson 192.168.1.254 n/a n/a
SpeedTouch 192.168.1.254 n/a n/a

If your router is not in the table above or the details do not work, try looking your router up on http://www.routerpasswords.com as some models can differ from the above table.