One way that hardware vendors try to make the configuration of a router easier is by instructing users to browse to a domain name rather than an IP address. TP-LINK routers use either tplinklogin.net or tplinkwifi.net.
The much newer TP-LINK Archer C9 instructs users, on the back label, to point their web browsers to the other domain, tplinkwifi.net.
No doubt, the use domain names rather than IP addresses has proven helpful to router owners. For the last few years, the most popular blog I have written here is the one from September 2013, on how to Find the IP address of your home router.
