Each version of the D-Link DIR-615 router has a default username of Admin and, like most D-Link routers, no default password. The default IP address used to access this router is 192.168. 0.1.
How to Change Your Dlink Router's WiFi Username (SSID) and Password | Dlink Factory Reset
If the default username and password don’t work, it’s likely that at some point during the life of your router, that information was changed. If so, the default credentials above won’t give you access to your router.
If you can't get in anymore, you can reset the router. When resetting, the existing username and password are replaced with the default data.
Plug in the router and turn it over so that all cables are connected.
