SNS in same country KR to KR

Question

Now i am in production but cannot send the message from the python code using ap-northease-2 (seoul), basically sending message from the KR to KR with +82 but faild to send. 
sms_client = boto3.client('sns', region_name='us-east-1')
sms_client.publish(
    PhoneNumber='+82',
    Message='Hello from Korea to Korea',
    MessageAttributes={
        'AWS.SNS.SMS.SMSType': {'DataType': 'String', 'StringValue': 'Transactional'}
    }
)
usign us-east-1 is possible but that is in sandbox. We wanted to send from KR to KR using ap-northeast-2 (seoul- production).

Could you help me all possible step that need to taken on AWS End User Messaging?

Looking forward your kind reply?

for your kind notice the error occurs like
File "/home/ubuntu/farmserver/mqtt_FR.py", line 6477, in send_sms
    'StringValue': 'Transactional'  # for alerts
  File "/home/ubuntu/.local/lib/python3.6/site-packages/botocore/client.py", line 508, in _api_call
    return self._make_api_call(operation_name, kwargs)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/botocore/client.py", line 911, in _make_api_call
    raise error_class(parsed_response, operation_name)
botocore.errorfactory.InvalidParameterException: An error occurred (InvalidParameter) when calling the Publish operation: Invalid parameter: PhoneNumber Reason: +82 is not valid to publish to

Thank you

Kidd Ip · Accepted Answer

How about this:

1. Use an Alternative SMS Provider

•	Twilio
•	Nexmo (Vonage)
•	KT or SK Telecom APIs (local providers)
These services support Korean numbers and offer production-grade delivery.
2. Use Email or Push Notifications via SNS
If SMS isn’t mandatory, SNS can still deliver:
•	Email notifications
•	Mobile push notifications (via Firebase, Apple Push, etc.)
•	HTTP endpoints (for app integrations)
3. Request SMS Support via AWS Support
If your use case is critical, you can:
•	Open a support ticket with AWS
•	Request enablement of SMS for South Korea
•	Provide business justification and expected volume
This doesn’t guarantee approval, but it’s worth trying if you’re committed to AWS SNS.

Mobashshir_A · Answer

Hello,
I observed that you are using "+82" in the phone number.
The issue here is likely with the phone number format being passed to Amazon SNS.

SNS requires phone numbers in E.164 format, which means:
The number must start with "+" followed by the country code and the full subscriber number (no spaces, no dashes).
For South Korea, instead of just +82, you need to include the entire phone number. 
Once you update the number format to full E.164, the InvalidParameter error should be resolved.
[+] https://docs.aws.amazon.com/sms-voice/latest/userguide/send-sms-voice-message.html

Should you need any additional and dedicated support, you can open a support case with AWS Support team:
[+] https://docs.aws.amazon.com/awssupport/latest/user/case-management.html

SNS in same country KR to KR

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