In a decisive move aimed at curbing unsolicited spam calls and protecting citizens from sophisticated digital fraud, the Department of Telecommunications (DoT) has ordered all telecom service providers across the country to mandatorily roll out the Calling Name Presentation (CNAP) facility starting November 1, 2026. Once this mechanism comes into effect, mobile phone users receiving incoming calls will no longer see just an unfamiliar string of digits on their displays. Instead, the screen will prominently show the caller's verified and official identity as recorded in carrier subscriber databases. This transparent identification will make it significantly easier for subscribers to detect impostors posing as bank officials, law enforcement personnel, or customer service representatives.
Trials completed on 4G and higher networks, rollout to be automatic
According to official directives issued by the authorities, telecom companies have already executed extensive field trials of the CNAP technology across wireless terrestrial networks running on 4G and higher generation standards. Crucially, eligible subscribers will not be required to submit formal applications, adjust complex device settings, or pay special activation charges to access the feature, as operators will enable it automatically for all qualifying users. For legacy architectures such as 2G, 3G, and traditional Public Switched Telephone Networks, the decision to implement caller name displays will be taken separately following comprehensive future technical reviews.
How incoming call displays will handle saved and unknown numbers
Under the existing infrastructure, Calling Line Identification (CLI) shows only the initiating telephone number when an inbound transmission rings through. The new regulatory framework expands CLI into a dual-element record, presenting the receiver with two distinct pieces of information simultaneously: the initiating telephone number alongside the authenticated name of the subscriber.
What appears on the handset screen will depend directly on whether the incoming phone number is already stored in the recipient's personal address book. If the number is already saved, the handset will continue prioritizing and displaying the custom contact name assigned by the owner. However, when an incoming call originates from an unsaved number within the country, the display will fetch and reflect the official name registered in the subscriber records of the originating service provider. For incoming overseas communications, individual names will not be transmitted, and handsets will simply display the label 'International Call'.
Strict data privacy protocols and zero persistence architecture
To prevent misuse and protect personal confidentiality, the framework establishes robust safeguards under Rule 48(1) of the Telecommunications Rules, 2026. The identification pipeline has been hardened to eliminate tampering or spoofing risks. Furthermore, regulators have made a strict 'security-by-design' architectural model mandatory for every operator handling caller identity signals. Under this privacy requirement, all temporary session records and subscriber identity data generated during the ringing phase must be purged from intermediary network nodes the moment a call terminates, ensuring that service providers cannot retain, log, or harvest these transient lookup details.
Registered business entities permitted to show trademarked trading titles
Recognizing the distinct operational requirements of commercial enterprises and enterprise calling centers, the guidelines provide a specific allowance for formal commercial entities. Legitimate businesses and high-volume calling organizations are permitted to display their officially registered trademark name or the commercial title documented on their Goods and Services Tax (GST) portal. This distinction will help phone users instantly differentiate between authentic transactional alerts from verified enterprises and dangerous fraudulent calls from cyber criminals.
