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Here are the list of IP and Address of Dota 2 Servers:

sgp-1.valve.net - SE Asia 1 (Singapore)
sgp-2.valve.net - SE Asia 2 (Singapore)
syd.valve.net - Australia (Sydney)
sto.valve.net - Russia 1 (Stockholm)
185.25.180.1 - Russia 2 (Stockholm)
vie.valve.net - Europe East (Vienna)
lux.valve.net - Europe West 1(Luxembourg)
146.66.158.1 - Europe West 2 (Luxembourg)
cpt-1.valve.net - South Africa 1 (Cape Town)
197.80.200.1 - South Africa 2 (Cape Town)
196.38.180.1 - South Africa 3 (Johannesburg)
208.78.164.1 - US East (Sterling)
eat.valve.net - US West (Seattle)
gru.valve.net - South America 1 (Sao Paulo)
209.197.29.1 - South America 2 (Sao Paulo)
209.197.25.1 - South America 3 (Sao Paulo)
dxb.valve.net - Dubai (UAE)
gw.hkg.valve.net - China


US West
Washington, USA
192.69.96.1

US East
Sterling, USA
208.78.164.1

Europe West
Luxembourg
146.66.152.1

Europe East
Vienna, Austria
146.66.155.1

SE Asia
Singapore
103.28.54.1
103.10.124.1

South America
Brazil
209.197.29.1
209.197.25.1

Russia
Stockholm, Sweden
146.66.156.1

Australia
Syndey, Australia
103.10.125.1

South Africa
Cape Town
197.80.200.1
196.38.180.1