l3cdn.riotgames.com is not working

I can't start the game because of the RADS error ; could not connect to the http server. My configs for the RADS are correct , but I can't ping l3cdn.riotgames.com or open it in the browser. I tried google's DNS and still the same results. What could be the issue? Could anyone tell me the IP of l3cdn.riotgames.com so that I could maybe add it to my hosts file?
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