SMS DLT regulations

The DLT regulations are applicable only for sending SMS on Indian mobile numbers

Telecom Regulatory Authority of India (TRAI) has released The Telecom Commercial Communication Customer Preference Regulation (TCCCPR) 2018 with the aim to regulate Unsolicited Commercial Communication (UCC) and make the unorganised SMS process more transparent. TRAI has formulated new guidelines to prevent SMS scams and bring more safety and convenience to the end users.

This system will be driven by the the DLT (Distributed Ledger Technology) which is a blockchain based technology. Let us understand this in more detail.

DLT Ecosystem for bulk SMS

Under the DLT technology, the companies that want to send transactional or promotional messages to their end-users will now have to register themselves with telecom operators. These companies have to be accountable to telecom operators, who will be directly accountable to TRAI.

The DLT ecosystem comprises of five different entities:


 Roles and responsibilities

 Principal Entity (PE)

Businesses like you who want to send SMS to their customers. 

As per the TRAI guidelines every PE has to be registered with the telecom operators in the DLT platform.

 End user

The end user is the mobile subscriber who will receive the SMS.

They have the right to provide consent to receive promotional SMS from any businesses, register complaints and out from unwanted/spam messages.

 Service Provider or Telemarketer

You will need service providers to send Bulk SMS to your end users. All the service providers have to be registered on the DLT platform as well so that they can send SMS's on behalf of the PE. 

MoEngage has direct integration with Gupshup & Kaleyra and helps you to meet the DLT compliances via these providers.

 Telecom Operators They are the access providers (Vodafone, Airtel, Idea, BSNL, etc) who are in direct connection with TRAI and aid with the regulation process.
 Regulator (TRAI)

TRAI will establish the regulatory compliance by auditing and governing the operations to safeguard customers’ preferences and prevent any fraudulent practices.


On the DLT platform, you will get the option to register as a Telemarketer or Enterprise. Any business that deal with customers and communicate with them through SMS you’re most probably a telemarketer.

There are 2 types of Telemarketers:

  • Telemarketer Aggregator: They doesn’t have a direct connection with the telecom operator. Could be an individual or company.
  • Telemarketer Delivery: They have a direct connection with telecom operators. Collect SMS/voice traffic from enterprises. 

Enterprises are the businesses that deal with products or services that would like to connect with leads through SMS to increase their sales.

DLT Registration

You would need to register to DLT platform via the individual operators.

The direct link to DLT portal for different operators is given below. You need to first register with any 1 operator.

As part of the process, you will be required to submit details such as Business Identity (PAN), Business Address Proof (GST/TAN) and Letter of Authorization on the network portal (start with any operator portal).

Post submission, you will receive the Unique Entity ID that you can later use to register on the other portals. This Unique Entity ID can then be used to register with all other operators.

Once you have the unique entity ID, add the headers and templates for promotional & transactional messages. And, add the registered headers and templates on other operator portals as well. 


As per the regulations its mandatory to register HEADER (Sender ID) & TEMPLATES with All operators to  avoid rejections from the cross operator. For more information on this, check this article

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