Remotely Configuring Router after unauthorized Factory Reset

Is there a way for me to remotely reconfigure my router after it went back to the factory default settings unbeknownst to me?  I am not anywhere near the router but need it activated and working properly as it is supporting other necessary components of my home network.  Of do I have to be physically within range of the router to do this?  I don't even know the model number or version (unless that can be determined by the serial number) but it is a WiFi/Router/Cable modem.  Thank you!  Paul