The instruction manual for the belkin says a momentary push on the reset will do a quick reset. Using 19216821 as a default gateway.

Belkin Official Support Changing The Wi Fi Password Of Your
Belkin router wont reset. On some routers the options are router maintenance and settings. Then you will need to select reset belkin router instead of factory restore. By default the password on the router is left blank. With the router powered on press and hold the reset button for exactly seven seconds this will restore the router to factory default. Log into your router as an administrator through 19216821. As a last option.
There are two ways to factory reset a belkin router a software reset and a hard reset. Your belkin router has now been reset to its factory default settings. In case if you still get any problem accessing your belkin router than we recommend you to reset your belkin router to default factory settings. The reset switch in belkin f5d7230 is not very easy to push. Soft factory reset a belkin router. Then very carefully without touching any electronic parts inside with your fingers use something to push the reset switch for few seconds.
How to hack wifi password using new wpawpa2 flaw. While still holding down the button unplug the router from its power source for another 30 seconds. To reset the router youll need to press this button while the router is connected to power and hold it down for about 10 seconds. Wait for at least one minute for the router to restart. After you release the button the router will reset itself to the factory default settings and then reboot. Navigate to administration select advanced settings and select restore factory defaults.
So this was all about on how to login into belkin router. While 20 seconds will perform a full hard reset. Power it up with the reset shorted for a while or in a sequence like this hold reset button while powered on for 5 secs while holding reset button unplug power for 5 secs replug power continue to hold reset for 5 secs. If you are having problem resetting it its best to open the 2 screws under the sticker at the bottom of the device and open it. While the router is powered on press and hold the reset button for 15 seconds. To solve this i decided to reset the router.
With the reset button still held down turn the power back on and hold for another 30 seconds. After this 90 second process is complete your router is restored to its factory default state.