The Telecom Regulatory Authority of India (TRAI) has directed telecom operators to share information about suspected spam callers and message senders with each other within two hours of detection. The February 27 direction creates a system in which operators use artificial intelligence (AI) to flag suspected spammers and immediately alert other networks through a blockchain-based platform .
Operators must comply within 30 days, setting the effective implementation date as March 29, 2026. TRAI triggers enforcement when operators flag five or more phone numbers belonging to the same person as suspected spam within ten days across all networks, leading to KYC re-verification and potential disconnection.
The regulator aims to shift spam enforcement from being primarily complaint-driven to proactive. TRAI noted that unregistered telemarketers generate approximately 85% of spam complaints and observed that simply alerting users about spam calls without taking backend enforcement action “does not act as a deterrent.”
However, the direction raises questions about the privacy implications of sharing customer data across networks, how different AI systems with varying parameters will work together, and whether operators could wrongly flag legitimate businesses.
How does the two-hour sharing system work?
The direction establishes a six-step process:
- Step 1: When a telecom operator’s AI system identifies a phone number as suspected spam based on behavioural parameters, the operator must share that number with other networks within two hours through the Distributed Ledger Technology (DLT) platform.
- Step 2: The network that originally issued the flagged number immediately sends a notification via SMS or email to the number’s owner.
- Step 3: Within one business day, the originating operator identifies the sender’s unique Know Your Customer (KYC) identifiers using subscriber records.
- Step 4: The originating operator shares these KYC identifiers with all other access providers through the DLT platform within the next business day.
- Step 5: All other operators identify all telecom resources they have allocated to that sender within one business day. They then examine whether any other number allocated to the same sender was flagged as suspected spam during the preceding ten days and share this information on the DLT platform the same day.
- Step 6: Once operators receive data about all the sender’s numbers flagged across all networks, they check within one business day whether five or more numbers belonging to that person were flagged within the last ten days.
What happens to repeat offenders?
TRAI triggers enforcement when operators flag five or more phone numbers belonging to the same person as suspected spam within ten days across all networks.
For the first instance, the originating operator carries out re-verification of the sender’s KYC within three business days and takes necessary action in…
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