127.0.0.1 is a local loopback for every machine/device on the planet
anything 192.168.... is internet unroutable.
If you have a router, the router acts as a dhcp server/nat translator so your isp assigns your ip address to the router, the router assigns all of your machines an internet unroutable address like 192.168.1.100 , 101,102,103...etc
to see your ip that the router is holding, open a command prompt window (2k/xp) and type
ipconfig /all and you'll see the ip your isp has assigned to you (which may or may not be static-most are assigned via their dhcp servers so it changes over time)
-RUST-
"What the... Mooooooooooo!"