-----------------------------------------------
Main server IP #1: 76.223.23.214:27015
Main Server IP #2: 13.248.152.229:27015

If Mains server is not visible then CONNECT TO PROXY ONCE and then wait for 10 second and CONNECT TO MAIN SERVER.

You can choose any proxy server.

Proxy SV #1: 139.99.68.198:13579
Proxy SV #2: 13.126.106.4:27015
Proxy SV #3: 15.206.43.57:27015

Regards
Team ECS