BlackSMS Knowledge Hub & Blog

DLT & Compliance

Aug 11, 2026 • 1,420 Views

What is a DLT Sender ID (Header)? Complete Guide with Screenshots & Examples

Learn what a DLT Sender ID (Header) is, how to read approved screenshots from Jio, Vodafone, and Videocon DLT portals, and how to submit your approved Sender ID to BlackSMS for transactional and promotional SMS delivery.

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DLT & Compliance

Jun 30, 2026 • 3,240 Views

Bulk SMS Without DLT Registration in India – How It Works in 2026

Can you legally send bulk SMS without DLT registration in India? Discover what 'DLT-free' SMS really means, which use cases are exempt, how transactional OTP routes work, and why BlackSMS is the trusted gateway for developers who need fast, compliant delivery.

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DLT & Compliance

Jun 30, 2026 • 1,690 Views

The Step-by-Step DLT Registration Guide: Complying with TRAI Bulk SMS Regulations

Navigate TRAI's Distributed Ledger Technology (DLT) registration with ease. Learn about Principal Entity registration, Header approval, Content Templates, and required business documentation.

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