Glossary

What is Sender ID?

Sender ID is the alphanumeric name or phone number that appears as the sender when an SMS message is received. In India, sender IDs are regulated by TRAI and must be registered through the DLT platform.

Sender ID formats vary by country and message type. In India, transactional SMS use 6-character alphabetic IDs (e.g., IN-BRAND), promotional SMS use numeric IDs, and service SMS use specific prefixes. Sender ID registration helps prevent spam and phishing.

InboxCentral manages sender ID registration and routing as part of SMS API setup.

Related InboxCentral feature

SMS API

Related terms

DLT (Distributed Ledger Technology for SMS)

A mandatory registration system for commercial SMS in India.

Promotional SMS

Marketing text messages sent to promote products or offers.

Transactional SMS

Non-promotional text messages triggered by user actions or system events.

See it in action

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