Applications using Amazon SNS to send SMS can now be hosted in the AWS GovCloud (US-West) Region
Customers that use Amazon Simple Notification Service (Amazon SNS) to send text messages (SMS) to mobile users can now host their application in the AWS GovCloud (US-West) Region. Using Amazon SNS, customers can send a message directly to a phone number, or can send a message to multiple phone numbers at once by subscribing those phone numbers to a topic and sending messages to the topic. Customers can send SMS text messages directly to mobile phone numbers in more than 200 countries.
Source:: Amazon AWS