Since you needed to make some changes to your home network and couldn’t remember your router password, you decided to reset the device and now you can’t remember the default password. The Router Passwords Database site should help. They update the data very frequently. This is also great if you are helping out a friend set up his home LAN or if you purchased a router from ebay and didn’t receive the documentation. Remember to change the password once you access the router. Leaving it as the default is a very bad idea.