In Windows, you can find your IP address using the following commands: 
In Windows XP/2k/2k3 go to: START>Programs>Accessories>Comand Prompt and type: 
ipconfigIn Windows 9x/ME, go to START>Run and type 
winipcfgYour IP address is also displayed by our online tools, such as the 
SG TCP Analyzer and the 
SG Security Scan.
Note: Some computers or devices can have multiple IP addresses assigned to them.