140 vs 1600 number series: which one your calls need
Which number series Indian businesses must use for promotional and service calls, and what TRAI's 2026 amendment changed.
The short answer
140-series numbers are for promotional calls. 160-series numbers are for service and transactional calls, and 1600 numbers are required for banks, insurers and other financially regulated entities.
What the rule says
TRAI and the Department of Telecommunications assign separate number series so customers can tell a sales call from a service call before answering.
What it means for AI calling
Sales outreach goes out on 140-series numbers. Reminders and updates to existing customers can use the service series assigned to you.
Checklist
- Classify each campaign as promotional or service
- Map each to the right number series
- Keep service calls free of promotional content
Put it to work
Knowing this is step one. The next step is acting on it every day without adding headcount. See how AI Calling does that, or book a 20-minute demo.
FAQs
140 vs 1600 number series?
Which number series Indian businesses must use for promotional and service calls, and what TRAI's 2026 amendment changed.
This guide is general information, not legal advice. Rules change; check the current regulation before relying on it.