Add the IP to favorites, I assume you like it since your troubled with it not being found.
If that doesn't work and it still doesn't show up.
Empty your filters indeed, or the server(s) could be offline.
HRP: 96.127.138.130:27015
HL2RP: 96.127.138.130:27035
OCRP: 96.127.138.130:27025
Deathrun: 96.127.138.130:27050
Sandbox: 96.127.138.130:27100
GMR: 96.127.138.130:27065