SMS SNS Dedicated Shortcode for only one country

It is possible to set up a dedicated registered short code to send SMS messages to phone numbers in the "main country".

1. You can use the AWS SDKs and specify the short code you've registered for the "main country" using the attribute AWS.MM.SMS.OriginationNumber. You can also specify the origination number (short code) in the AWS Management Console when sending SMS messages.

2. For phone numbers in countries other than the "main country," you can use a sender ID or any other origination number supported by those countries. Different countries have different regulations regarding SMS messaging, and some countries support the use of short codes, while others do not.

Below is the AWS documentation provides a list of countries supported by Amazon SNS for SMS messaging:

[+] https://docs.aws.amazon.com/sns/latest/dg/sns-supported-regions-countries.html

It's important to review the regulations and requirements for each country to ensure compliance when sending SMS messages.

Below is the AWS documentation provides guidance on how to send SMS messages using the AWS Management Console or the AWS SDKs:

[+] https://docs.aws.amazon.com/sns/latest/dg/sms_publish-to-phone.html#sms_publish_sdk