Hi, you can easily find security code. Just follow these steps:
1) Open your web browser and type IP address of your router.
2) A web page will open and you have to fill username and password in empty boxes.
3) Go to wireless security/Network security settings tab and open it to find your Belkin Router security code (use WPA). Note down this security code for future use.
How to Find the Belkin Router Security Code?