- Why in news
- On 10 August 2026, TRAI issued a Direction starting phase-wise use of 1601-series numbers for service and transactional calls by non-BFSI, non-government entities, beginning with utilities, courier and logistics.
- What it is
- The 1600 series is a numbering block for service and transactional voice calls by banks, financial services, insurance and government entities. The 1601 series, allotted by the DoT, extends the same trusted-number idea to other sectors. It lets consumers tell genuine business calls from fraudsters using ordinary 10-digit numbers.
- Phase-I sectors
- Phase-I covers utilities (power, water, city gas, LPG) and logistics and courier services.
- Who allots
- The series was allotted by the DoT, and TRAI is directing its phased rollout.
- Direct allocation
- Numbers go directly to eligible entities, not to intermediaries or aggregators, after verification by telecom service providers.
- Deadline
- TSPs must complete migration and onboarding of Phase-I entities within 90 days of the order.
- Use restriction
- Entities give an undertaking of exclusive use for service and transactional calls; promotional calls are barred.
Don’t confuse with 1600 vs 1601 series: 1600 is for BFSI and Government entities; 1601 is for other sectors, starting with utilities, courier and logistics.
Don’t confuse with Service/transactional vs promotional calls: 1601 numbers are only for service and transactional calls. Promotional calls cannot use them.
Economy terms and data: 42 Prelims questions since 2013, rising in recent years; they test what a term or instrument means. In Mains, 12 news-triggered questions.
Why it matters
- Distinct numbers help consumers spot genuine calls and reduce impersonation fraud.
- Keeping financial calls on a separate series avoids mixing them with other sectors' calls.
Problems
- Consumers must learn the new series, and fraudsters may still spoof or use other channels.
- Verification and migration of many entities within 90 days burdens TSPs.
Way forward
- Extend to further sectors in later phases with strict verification and audits.
- Run consumer awareness campaigns and monitor misuse.
Put in your answer
Trusted numbering framework: The 1600 series for BFSI and Government gave experience now applied to other sectors via 1601.
No close past question yet.
No practice question for this one; the card may still help an answer. Why: New TRAI direction for phased use of 1601 series, parallel to 1600 for BFSI and government. Narrow topic, little for a statement.
Worth revising until Prelims 2028: most news questions come within two years of the event.