Sim, você pode testar a latência (ping) para as regiões da AWS usando endpoints públicos das regiões da AWS.
Isso te dará uma boa ideia de qual delas oferece a menor latência para sua localidade.
A lista completa das regiões está abaixo:AWS que você pode testar usando ping, com seus respectivos endpoints:
US East (N. Virginia) / ec2.us-east-1.amazonaws.com
US East (Ohio) / ec2.us-east-2.amazonaws.com
US West (N. California) / ec2.us-west-1.amazonaws.com
US West (Oregon) / ec2.us-west-2.amazonaws.com
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Asia Pacific (Mumbai) / ec2.ap-south-1.amazonaws.com
Asia Pacific (Hyderabad) / ec2.ap-south-2.amazonaws.com
Asia Pacific (Hong Kong) / ec2.ap-east-1.amazonaws.com
Asia Pacific (Singapore) / ec2.ap-southeast-1.amazonaws.com
Asia Pacific (Sydney) / ec2.ap-southeast-2.amazonaws.com
Asia Pacific (Jakarta) / ec2.ap-southeast-3.amazonaws.com
Asia Pacific (Seoul) / ec2.ap-northeast-2.amazonaws.com
Asia Pacific (Osaka) / ec2.ap-northeast-3.amazonaws.com
Asia Pacific (Tokyo) / ec2.ap-northeast-1.amazonaws.com
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Canada (Central) / ec2.ca-central-1.amazonaws.com
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South America (São Paulo) / ec2.sa-east-1.amazonaws.com
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Europe (Stockholm) / ec2.eu-north-1.amazonaws.com
Europe (Ireland) / ec2.eu-west-1.amazonaws.com
Europe (London) / ec2.eu-west-2.amazonaws.com
Europe (Paris) / ec2.eu-west-3.amazonaws.com
Europe (Frankfurt) / ec2.eu-central-1.amazonaws.com
Europe (Milan) / ec2.eu-south-1.amazonaws.com
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Africa (Cape Town) / ec2.af-south-1.amazonaws.com
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Middle East (Bahrain) / ec2.me-south-1.amazonaws.com
Middle East (UAE) / ec2.me-central-1.amazonaws.com