Short answer: DLT registration is a four-layer job. You register the business as a principal entity on an operator’s DLT portal, register each header, register each content template, and keep a consent record. From 17 November 2026 you must also declare your A2P calling line identities to your originating operator before you dial.
Most guides to the DLT registration process stop at “upload your PAN and GST certificate”. What actually holds campaigns up is the detail nobody writes down: which header format suits which message type, what a template may contain, and — new this autumn — the fact that outbound voice has a registration step of its own. Here is the state of play as at 1 October 2026.
What DLT registers
DLT — distributed ledger technology — is the shared register the Indian access providers run to implement the Telecom Commercial Communications Customer Preference Regulations, 2018. Each operator runs a portal: Vodafone Idea’s VILpower, Jio’s TrueConnect, and Airtel’s and BSNL’s equivalents. You register once with one as primary and the record is shared.
Vodafone Idea’s DLT FAQ, read on 1 October 2026, lists the seven entity classifications its portal accepts: individual, sole proprietor, partnership firm, private/public/government limited company, LLP, trust or association (TASC), and government entity. If your legal form is not one of those seven, sort that out before you start.
The registration process, in order
The layers are strictly sequential. You cannot register a template against a header that does not exist, and you cannot send against a template that has not been scrubbed.
- Principal entity registration. Business documents, authorised signatory, and the email and mobile number that become your account of record. The Second Amendment of February 2025 added biometric authentication and physical verification, so expect an Aadhaar-based or in-person step rather than a pure document upload.
- Telemarketer binding. You nominate the registered telemarketer that will transmit on your behalf and grant it specific permissions. The permissions are granular, and a missing one looks identical to a rejected template.
- Header registration. Promotional headers are six-digit numeric; service and transactional headers are six-character alphabetic. Vodafone Idea’s FAQ gives examples of both — 565690 or 555555 for promotional, strings such as KLMNOP for service and transactional.
- Content template registration. Templates are registered per header and per category, with variables tagged. Every message is scrubbed against its registered template before delivery.
- Consent registration. Anything promotional needs a consent record. The Third Amendment of September 2026 widened this: explicit consent now includes consent “obtained by the Sender through any verifiable means prior to or outside the Consent Registration Function framework, and subsequently registered in the Consent Register”.
Since February 2025 registered headers also carry a category suffix. Schedule I of that amendment specifies “-P”, “-S”, “-T” and “-G” for promotional, service, transactional and government messages, so the recipient can tell from the header alone what they have been sent. The same amendment requires senders to self-certify registration details, headers, templates and consent records annually, with suspension as the penalty. That certification is the most commonly missed obligation in the framework.
What changed on 18 September 2026
TRAI notified the TCCCPR (Third Amendment) Regulations, 2026 in the gazette on 18 September 2026. It does not commence all at once — it arrives in three waves, and for voice the second one is the one to diarise.
Counting 30, 60 and 90 days from 18 September 2026 gives 18 October, 17 November and 17 December 2026. General provisions come first. Regulation 4 — the A2P declaration — together with regulations 6, 8(a) and 18 commence at 60 days. The appeal mechanism, complaint corroboration and template suspension for wrong categorisation commence at 90 days.
Voice now has a registration step of its own
Under regulation 4, a sender using A2P (application-to-person) calls must declare that use to its originating access provider in advance, including the “Calling Line Identification (CLI) ranges to be used for making A2P calls, or any other details as specified by the Authority”. Calls made without that declaration are treated as unsolicited commercial communication — meaning the machinery for unregistered telemarketers applies to you.
The designated series are carved out: the amendment permits commercial communication over the “140xx, 1600xx, 1601xx series, or any other numbering series specially designated by the Authority”. We set out how these differ in our explainer on the TRAI 140 and 1600 series. In short, 140 is promotional and subject to DND, while 1600 was allocated by TRAI’s direction of 16 December 2025 to government and BFSI entities for service and transactional calls, with IRDAI-regulated entities to complete adoption by 15 February 2026.
Pacing matters too. Under the new regulation 21A, terminating operators use AI and machine learning to flag numbers as a “Suspected high probability UCC CLI” and share that with originating operators within two hours. Where “five or more CLIs of the Sender have been identified as ‘Suspected high probability UCC CLI’ within a period of last ten days”, the originating operator must act — so complaints are no longer the only trigger.
SMS and voice: what each one needs
| Requirement | SMS | Outbound voice / IVR |
|---|---|---|
| Principal entity registration | Yes | Yes |
| Registered header | Yes — 6-digit numeric (promotional), 6-character alpha (service, transactional) | No header; identity is the calling number |
| Content template registration and scrubbing | Yes, per header and category | No template register |
| Category suffix on the header | Yes — -P, -S, -T, -G | Not applicable |
| Designated numbering series | Not applicable | 140xx promotional; 1600xx / 1601xx designated service and transactional |
| A2P declaration of CLI ranges | Not applicable | Yes, from 17 November 2026 |
| Consent record for promotional traffic | Yes | Yes |
| Annual self-certification | Yes | Yes |
What it costs — and what nobody publishes
We checked the public DLT portals on 1 October 2026. None publishes a principal entity registration fee on a page you can read without logging in. Several messaging vendors quote ₹5,900 inclusive of GST as a standard across Airtel, Jio and Vodafone Idea, but we could not trace that to an operator’s own published page, so we will not repeat it as fact. Get the current fee from your operator or telemarketer in writing before you budget. What is published is the telemarketer fee, which matters if you are weighing registering as one yourself.
| Item | Published figure | Source, observed 1 Oct 2026 |
|---|---|---|
| Telemarketer — Aggregator Function (TM-AF) | ₹5,000 | VILpower DLT FAQ |
| Telemarketer — Delivery Function (TM-DF) | Additional ₹50,000 | VILpower DLT FAQ |
| Principal entity registration | Not published publicly by any operator we checked | Checked 1 Oct 2026 |
| Header / template registration | Not published publicly by any operator we checked | Checked 1 Oct 2026 |
| Restoring a suspended telecom resource | ₹5,000 per resource, capped at ₹5,00,000 | Third Amendment, reg. 29 |
| A2P call termination charge (operator to operator) | Up to ₹0.05 per minute, per-minute pulse | Third Amendment, reg. 35A |
A worked example in rupees
Take a lender making 50,000 outbound reminder calls a month from ordinary numbers rather than a designated series, averaging 38 seconds answered. Regulation 35A is billed on a per-minute pulse, so a 38-second call is one pulse. At the ceiling of ₹0.05 per minute that is 50,000 × 1 × ₹0.05 = ₹2,500 a month in termination charge at operator level, or ₹2,950 with 18% GST. Five paise a call — and it goes to zero if the same traffic moves to a 1600 or 1601 series number, which the amendment exempts.
The risk sits on the other side. Dial without declaring your CLI ranges after 17 November 2026 and the traffic is treated as coming from an unregistered telemarketer. Under regulation 25(5)(d), suspension follows on either three or more complaints from unique recipients in ten days where a CLI has also been flagged, or five or more complaints from unique recipients in ten days with no flag needed. Restoration then costs ₹5,000 per resource — five resources is ₹25,000, against a ₹2,500 monthly charge avoided. The declaration itself is free.
Frequently asked questions
Do I need to register separately with every operator?
No. You register as a principal entity on one operator’s DLT portal and the record is shared across the access providers. Headers and templates registered through the primary portal are honoured by the others.
Does DLT registration cover WhatsApp?
No. DLT governs SMS and voice over Indian telecom networks. WhatsApp is an over-the-top service billed by Meta on its own rate card and governed by Meta’s policies, not TCCCPR. We cover that bill in our guide to WhatsApp Business API pricing in India.
Which deadline do I actually need in my calendar?
17 November 2026, if you make automated outbound calls — 60 days from the 18 September 2026 gazette date, when the A2P declaration under regulation 4 commences. Before that, 18 October 2026 brings the amendment’s general provisions into force.
Can I use consent collected before DLT existed?
The Third Amendment recognises consent obtained by any verifiable means outside the consent registration framework, provided it is subsequently registered in the Consent Register. The consent is not void, but it has to be loaded into the register and evidenced.
How long is explicit consent for service calls valid?
Seven days, or until the customer revokes it, whichever is earlier — renewable for a further seven days at the customer’s instance. Communications following a written or digital enquiry are permitted within the seven days immediately preceding the communication, and the enquiry must be kept in verifiable form.
Is a 10-digit mobile number ever acceptable for campaigns?
Not for telemarketing. The framework directs promotional calling to 140 and service and transactional calling to the designated 1600 and 1601 series. Ordinary numbers used for A2P calling must at minimum be declared in advance, and get neither the termination-charge exemption nor the flagging protection the designated series carry.
Verification note and sources
Every figure and rule above was checked against a live source on 1 October 2026. Two caveats: the principal entity registration fee is not published by any operator we could read publicly, so get any quoted figure in writing; and ₹0.05 per minute is a ceiling (“upto”), not a set rate, so what is passed through may differ. The commencement dates are arithmetic off the gazette date of 18 September 2026.
- TRAI, TCCCPR (Third Amendment) Regulations, 2026, gazette dated 18 September 2026.
- TRAI, TCCCPR (Second Amendment) Regulations, 2025, gazette dated 12 February 2025.
- TRAI, Direction dated 16 December 2025 on adoption of the 1600 series.
- TRAI, Press Release No. 91/2026 on the 140 and 1600 series.
- Vodafone Idea, VILpower DLT FAQ.
Related reading: bulk voice call pricing in India, IVR survey cost per completed response and SMS versus WhatsApp versus voice cost. We sell voice and messaging ourselves — see our pricing.