Understanding international and local routes for India - AWS End User Messaging SMS
Services or capabilities described in AWS documentation might vary by Region. To see the differences applicable to the AWS European Sovereign Cloud Region, see the AWS European Sovereign Cloud User Guide.

Understanding international and local routes for India

International routes (ILDO)

By default, when you send messages to recipients in India, AWS End User Messaging SMS uses International Long-Distance Operator (ILDO) routes to transmit those messages. When recipients see a message sent over an ILDO connection, it appears to be sent from a random shared short code (unless you purchase a dedicated short code). International SMS to India is delivered via short codes rather than alphabetic sender IDs.

International routes are not subject to any AWS Region restriction. You can send messages to India over international routes—whether using a shared or dedicated short code—from any AWS Region where AWS End User Messaging SMS is available.

Local routes (DLT-registered sender IDs)

Companies that are registered in India can also use dedicated alphabetic sender IDs to send their messages. If you prefer to use a sender ID, you must send those messages over local routes rather than ILDO routes. Local routes require you to complete the DLT registration process described on this page.

Important

AWS End User Messaging SMS only supports local India routes through AWS regions AP-SOUTH-1 Asia Pacific (Mumbai) and AP-SOUTH-2 Asia Pacific (Hyderabad). This restriction applies to local routes that use DLT-registered sender IDs. It does not apply to international routes or short codes, which can be used from any AWS Region.

Cost comparison

Note

The price for sending messages using international (ILDO) routes is significantly higher than the price for sending messages through local routes. For current pricing for both route types, see the AWS End User Messaging Pricing page.