What Is the 140 Series?

The 140 series is a block of 10-digit numbers starting with 140, assigned to registered telemarketers in India for promotional, service, and transactional voice calls. It is not a city or STD code. The series exists so that people can recognize a telemarketing call before they pick up, and so that calls can be traced and checked against Do Not Disturb (DND) rules.

Quick Facts

The 140 series falls under telecom regulation and outbound calling compliance in India. Its purpose is transparency and traceability for marketing calls. It is used by businesses, enterprises, and telemarketers running offers, product launches, and surveys. It works alongside DLT (Distributed Ledger Technology) registration, which is where businesses and their voice templates are registered. The related 1600 series is used for service and transactional calls.

Why It Matters

Customers screen unknown numbers more than ever. A call from a regular mobile number is often marked as spam by the telco or by an app like Truecaller before it is even answered.

A regulator-assigned prefix gives marketing calls a recognizable identity. Used properly, it can lower complaint rates, improve pickup, and protect brand reputation. For sales and marketing teams, it is both a compliance requirement and a trust signal.

Is 140 an STD Code?

No. A common search is "140 std code of which city," but 140 does not belong to any city. STD codes identify geographic areas for landlines. The 140 series is a telemarketing prefix that applies across India, so a number starting with 140 usually means a registered business is calling to promote something.

How to Get a 140 Series Number

1. List every outbound campaign and separate promotional calls (140 series) from service calls (other series).
2. Choose a VNO or cloud telephony provider that handles number procurement and DLT support.
3. Complete DLT registration for the business (Principal Entity) and the telemarketer.
4. Register voice templates on DLT. Scripts for promotional campaigns must be approved and include the required disclosures.
5. Connect the 140 numbers to your dialer or CRM so campaigns do not run from personal or handset numbers.
6. Test with small batches first. Track pickup rate, complaint rate, and call duration for 140 campaigns separately.
7. Tell customers in advance by SMS or email that offers will come from a 140 number.

Key Features of the 140 Series

• Dedicated number block for promotional voice calls
• Makes telemarketing calls easy to identify
• Supports traceability and DND compliance
• Requires DLT registration and approved voice templates
• Works with SIP trunks and cloud contact center platforms

Benefits

Using the correct series reduces the risk of calls being blocked and helps keep complaint numbers down. It also builds recognition, since customers who expect a 140 call are more likely to answer it. For businesses, it means campaigns stay aligned with TRAI rules instead of being disrupted later.

140 Series vs Regular 10-Digit Mobile Numbers

A regular mobile number is meant for personal and standard use. TRAI requires promotional voice outreach to move off these numbers to the regulated 140 series. Calling prospects from handset numbers can lead to blocks, more complaints, and wasted campaign spend.