If you didn’t change it, the default credentials vary by manufacturer and device. If the default doesn’t work, reset the router.
Default 192.168.1.1 Username and Password
If you own a Linksys router, browse the default passwords list to find the username and password that belong to your specific router. That list shows lots of model numbers that you can use to look up your router’s default login information.
If 192.168.1.1 is used to access your NETGEAR router, use the NETGEAR default password list instead. D-Link routers may also use the 192.168.1.1 address. If you have a D-Link router with that address, a different list of D-Link routers can help you find the default username and password combo that goes with it.
The Default 192.168.1.1 Password Doesn’t Work
If 192.168.1.1 is the address to your router, but you can’t use the default password or username to log in, the default password or username was changed at some point after the router was installed.