The Telecom Regulatory Authority of India (TRAI) has issued clarifications regarding the operational framework for the designated 1600 and 140 number series, aiming to dispel public misinformation following media reports and public commentary.
Distinct Mandates for Each Series
According to the Ministry of Communications, the 1600xx series is exclusively reserved for service and transaction calls by regulated entities in the BFSI sector—those governed by the RBI, SEBI, IRDAI, and PFRDA—as well as for government-to-citizen communication. TRAI stated that a key objective is to make these calls trustworthy for customers and citizens.
Under the Telecom Commercial Communications Customer Preference Regulation (TCCCPR), any tagging, blocking, or filtering of calls originating from 1600 series numbers is strictly prohibited. This provision safeguards these institutional communication channels from external interference by third-party applications.
Commercial Outreach Under 140 Series
For promotional calls, TRAI mandates the use of 140xx series numbers. Entities seeking to use these numbers must register with Telecom Service Providers under the TCCCPR framework and comply with all regulatory provisions. Citizens have the right to block or allow promotional calls from any sector by registering their preference on the Do Not Disturb (DND) registry.
TRAI clarified that customers who block a sector will not receive any calls from 140 series numbers originating from entities in that sector. Preferences can be updated through official tools, including the TRAI DND App. The authority emphasized that any tagging or filtering of calls from 140 series numbers is not allowed except for blocking via the DND registry, as tagging could mislead customers who have otherwise consented to receive such calls.
Truecaller CEO's Criticism
The clarification comes a day after Truecaller CEO Rishit Jhunjhunwala publicly criticized TRAI's stance. On X, he argued that restrictions preventing caller ID apps from displaying community-reported information for these number series have led to a surge in spam calls and reduced answer rates. He stated, "We are the good actors who are helping hundreds of millions of Indians every day, including the vulnerable elderly, to have a trusted communication experience."
Regulatory Intent and Consumer Protection
TRAI's framework aims to balance consumer protection with the integrity of official communications. By prohibiting third-party tagging of 1600 and 140 series calls, the regulator seeks to prevent misrepresentation and maintain trust in designated communication channels.



