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SMS Sender ID Suffix for India

Starting May 6, 2025, all SMS Sender IDs will include a message-type suffix as per the new TRAI rules. This will help recipients identify the type of SMS they’re receiving (Promotional, Service, etc.).

What’s Changing?

Your SMS Sender ID will now include a 2-letter suffix based on the type of message you’re sending.
This change is automatic and handled by your DLT platform and telecom provider.

Example:

If your Sender ID is ZIXMSG and you send a service message, it will appear as:
VM-ZIXMSG-S
Where:

  • VM = Operator code

  • ZIXMSG = Your registered Sender ID

  • -S = Suffix showing the message type

🏷 Suffix Types

Message TypeSuffixExample

Promotional

P

ZIXMSG-P

Service (Implicit)

S

ZIXMSG-S

Transactional (OTPs, etc.)

T

ZIXMSG-T

Government (Exempted)

G

ZIXMSG-G

📌 “Service Explicit” messages will now be treated as Promotional and get the -P suffix.

✅ Do You Need to Do Anything?

Everything is handled by your DLT platform and Zixflow.

  • Your templates and headers stay the same.

  • The suffix will be added automatically.

  • You don’t need to make any changes.

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