The telecom regulatory authority of India (TRAI) has launched the phase-wise implementation of the 1601-series numbering system for service and transactional voice calls from entities in the utilities, courier and logistics sectors, expanding a trusted calling framework already used by the banking, financial services and insurance (BFSI) sector.
The move is aimed at helping consumers distinguish legitimate service and transactional calls from fraudulent calls made by impersonators using ordinary 10-digit mobile numbers.
TRAI issued directions on Monday for the use of the 1601-series by eligible entities in sectors other than BFSI and government organisations, which have been allotted the 1600-series for similar communications.
The regulator said the separate numbering identity for non-BFSI sectors would prevent important financial and government-related voice communications from being mixed with service calls from other industries.
The department of telecommunications (DoT) has allocated the 1601-series for the purpose, with implementation beginning with utilities, courier and logistics entities.
Electricity, LPG and Courier Firms Covered in First Phase
Under Phase-1, the 1601-series will be available to eligible entities in the utilities sector, including electricity distribution companies, water utilities, city gas distribution companies, LPG distribution entities and other utility service-providers.
The logistics and courier category covers courier companies, express logistics operators, parcel delivery companies and freight and logistics service-providers involved in the delivery of consignments.
TRAI said the first phase was decided after consultations with stakeholders and builds on the experience gained from the adoption of the 1600-series by BFSI entities.
The regulator expects the distinct numbering system to make it easier for consumers to recognise genuine service and transactional calls and reduce the scope for fraudsters to impersonate legitimate companies.
"The distinct numbering identity will enable the consumers to easily identify legitimate service and transactional calls, thereby, strengthening trust in such voice-based communications," TRAI said.
Telecom Operators Get 90-Day Deadline
Telecom service-providers (TSPs) have been directed to complete the onboarding and migration of eligible entities covered under Phase-I within 90 days from the date of the order.
The 1601 numbers will not be handed out through intermediaries or aggregators. Instead, they will be assigned directly to eligible entities after telecom operators verify their eligibility.
This verification requirement is intended to strengthen the credibility of the numbering system and ensure that only legitimate organisations obtain the dedicated calling identity.
Entities receiving 1601 numbers will also have to provide an undertaking that the numbers will be used exclusively for service and transactional voice calls.
TRAI has expressly barred the use of the 1601-series for promotional voice calls.
New System Aimed at Impersonation Fraud
The introduction of the 1601-series comes against the backdrop of the growing use of ordinary mobile numbers by fraudsters posing as banks, utility providers, delivery companies and other trusted organisations.
A dedicated numbering identity can give consumers an additional indicator that a call is genuinely connected to a registered service provider.
TRAI said the trusted numbering framework is expected to become an important tool in tackling impersonation, particularly where fraudsters use regular 10-digit numbers to pose as representatives of legitimate businesses.
The regulator's move also seeks to improve confidence in voice-based customer communications and to establish clearer distinctions between promotional calls and service-related communications.
How 140, 1600 and 1601 Numbers Differ
The 1601-series will form part of a broader numbering framework developed to help consumers identify the nature of incoming commercial and service calls.
The 140-series is used for promotional calls. Calls originating from 140 numbers are checked against subscribers' do-not-disturb (DND) preferences before being delivered, helping consumers manage whether they want to receive such communications.
The 1600-series is designated for service and transactional calls from entities in the BFSI sector as well as government-to-citizen communications.
The new 1601-series will initially cover service and transactional calls from utilities, courier and logistics companies.
The separation of these numbering ranges is intended to provide consumers with greater clarity about why an organisation is contacting them and whether a call is promotional or service-related.
1601 Cannot Be Used for Marketing Calls
TRAI has made it clear that entities allocated 1601 numbers cannot use them for promotional voice calls.
The restriction is intended to preserve the purpose and credibility of the series. A number carrying the 1601 identity is expected to represent a service or transactional communication rather than an unsolicited marketing call.
The regulator's verification and direct-allocation requirements are also designed to prevent misuse of the system by intermediaries or entities that are not eligible to receive the numbers.
Expansion of Trusted Numbering Framework
The 1601 rollout follows the broader adoption of the 1600 series by BFSI entities. TRAI said the experience gained from that implementation provided a basis for extending the trusted numbering model to other sectors.
For consumers, the framework is intended to provide another layer of protection against voice-based impersonation scams. However, the dedicated number should be treated as an identification aid rather than a substitute for basic verification when a caller requests sensitive information, payments or other financial action.
With telecom operators given 90 days to complete onboarding of eligible entities in the first phase, utility companies and courier and logistics operators are expected to gradually begin using the 1601-series for their service and transactional calls.
