by convention, the first address in a block of IP addresses is used for the default gateway/router, so, yes, 192.168.X.1 is quite typical for adsl modem/routers or routers for cable connections.


host names often come from the device running avahi (aka bonjour) or samba (windows file sharing). these might show up in File Manager. sometimes you can get some joy by doing "smbclient -L 192.168.1.2" and seeing what it says.