Android: Unable to make HTTP request. Unable to resolve host

I am trying to connect to DynamoDb through Cognito using the code that Amazon provides. All I change are the application specific options.

When I execute the code, I get the following exception: com.amazonaws.AmazonClientException: Unable to complete HTTP request: Unable to resolve host "cognito-identity.us-east-1.amazonaws.com": No address associated with hostname.

What is an exception from me? I would assume the host list is internal to the Amazon libraries.

Thank you!