How it works on Indian calls
The NCPR sits under TRAI's Telecom Commercial Communications Customer Preference Regulations (TCCCPR), 2018. People register their preferences on it, choosing to block every commercial call or only some categories. Those preferences decide who may receive a promotional call.
The rules that matter for a calling campaign:
- Promotional calls need a green light. Either the person's preferences allow that category, or they've given consent that's registered on the operators' DLT platform.
- Older consent has to be verifiable. Under TRAI's amendment of 18 September 2026 (PIB release ID 2311989), consent taken earlier counts only if it was obtained in a verifiable way and is registered on the DLT platform.
- Enquiries open a short window. The same amendment lets a business send commercial communications for seven days after a customer enquires, if the enquiry is in writing or digital and kept in verifiable form.
- Complaints are easy to make. People report unwanted calls by calling or texting 1909, or through the TRAI DND app.
Say a clinic wants to call past patients about a health check-up offer. Any number whose DND preferences block that category, with no registered consent behind it, should come off the list before the first dial.
Why it matters
Calls that ignore DND preferences draw complaints. Under the 2026 amendment, three unique complaints in 10 days, together with an AI spam flag from the operator, are enough for the operator to act against the sender.
How Kallix handles it
Kallix checks every number against the NCPR before a campaign dials. On promotional calls, DND-registered numbers are skipped unless the contact carries a consent record. You can store each person's consent source and date on the contact when you upload a list or push contacts by API. Campaigns →