TRAI’s New 1601 Number Series: What Utilities, Courier and Logistics Companies Need to Know

If your company calls customers about electricity bills, gas services, water supply, parcel deliveries, or other service-related updates, a new telecom numbering requirement may affect how you make those calls.

On 10 August 2026, TRAI introduced the 1601 numbering series for service and transactional voice calls made by eligible entities outside the BFSI and government sectors. Utilities, courier companies, and logistics businesses are included in the first phase.

The Department of Telecommunications (DoT) had already approved the allocation of the 1601 series on 30 June 2026. The series is intended to give legitimate service calls a recognizable identity and help customers distinguish them from promotional or potentially fraudulent calls.

The important question for businesses is simple:

If your company makes customer service or transaction-related calls, do you need to move to 1601, and what should you do now?

This guide explains the 1601 number series in simple terms and outlines the steps businesses should take.

What is 1601 Number Series?

The 1601 number series is a dedicated numbering range for service and transactional voice calls made by eligible entities outside the BFSI and government sectors.

The Department of Telecommunications approved the 1601 series specifically for these types of calls under the Telecom Commercial Communications Customer Preference Regulations (TCCCPR), 2018.

The DoT’s allocation document specifies the 1601 numbering structure and requires telecom service providers to verify entities before assigning numbers. Businesses must also provide an undertaking that the assigned number will be used only for permitted service and transactional calls.

DoT: 1601 Numbering Series Allocation Order

In simple terms:

1601 is designed to help customers recognize legitimate service-related calls from eligible businesses.

For example, a customer may receive a call from a utility company about a bill, a courier company about a delivery, or another eligible service provider about an existing transaction.

Why TRAI Introduced 1601?

Customers often receive calls from unknown 10-digit numbers. This makes it difficult to know whether a call is genuine, promotional, or potentially fraudulent.

TRAI’s broader approach to designated calling series is intended to make legitimate commercial communications easier for consumers to identify.

The same principle already exists with the 1600 series, which is used for service and transactional calls by eligible BFSI and government entities.

The government has explained that designated numbering helps consumers distinguish genuine service and transactional calls from other commercial communications.

PIB: Government explanation of designated 1600-series numbers

The 1601 series extends this approach to eligible entities outside the BFSI and government sectors.

1600 vs 1601: What is the Difference?

The two numbering series serve similar purposes, but they apply to different groups.

Number Series	Mainly Intended For	Purpose
1600	Government and eligible BFSI entities	Service and transactional voice calls
1601	Eligible entities outside BFSI and government sectors	Service and transactional voice calls
140	Entities making promotional calls	Promotional voice calls

TRAI has separately clarified that the 1600 series is used for service and transaction calls by regulated BFSI entities and government entities, while 140 is used for promotional calls.

TRAI: Advice to Senders

This distinction is important because businesses should not treat 1601 as a general-purpose business calling number.

Who Needs to Use the 1601 Series?

The first phase covers utilities and logistics/courier businesses.

1. Utilities

The Direction identifies examples such as:

• Electricity distribution companies
• Water utilities
• City gas distribution companies
• LPG distribution entities
• Other eligible utility service providers

2. Courier and Logistics

The first phase also includes businesses such as:

• Courier companies
• Express logistics companies
• Parcel delivery providers
• Freight and logistics companies involved in delivery of consignments

The list is not limited to the exact examples above. The Direction uses broader wording for eligible utility service providers.

If you are unsure whether your business falls within the eligible category, check with your telecom service provider before assuming that you are covered.

What Type of Calls Can Be Made From a 1601 Number?

This is one of the most important points.

A 1601 number is intended for service and transactional voice calls.

It is not meant for promotional calling.

For example, a courier company could use an eligible service number for a call related to an existing parcel or delivery.

A utility company could use it for a call related to an existing customer service or transaction.

A business should not use the same 1601 number to make sales or promotional calls.

TRAI’s TCCCPR framework distinguishes service communications from promotional communications and establishes rules for commercial communication.

TRAI: TCCCPR 2018 Framework

What is Service or Transactional Call?

In simple terms, a service or transactional call is connected to an existing customer relationship, transaction, product, or service.

Examples can include:

• Confirming an existing transaction
• Providing information about an existing service
• Giving a delivery-related update
• Providing safety or security information
• Sharing information related to a product or service already used or purchased

TRAI’s guidance explains that service calls can be used to facilitate, complete, or confirm a commercial transaction that the customer has already agreed to enter into.

TRAI: Advice to Senders – Service and Promotional Calls

The exact classification of a call should be reviewed against the applicable TCCCPR requirements rather than decided only by the business.

Can You Use 1601 for Promotional Calls?

No.

The 1601 series is intended for service and transactional voice calls.

Promotional calling follows a different regulatory framework. TRAI identifies the 140 series for promotional calls.

This means businesses should keep their calling operations properly separated.

For example:

Service call:
“Your electricity bill is due on 15 August.”

Transactional call:
“Your parcel is scheduled for delivery today.”

Promotional call:
“We have a new plan available. Would you like to upgrade?”

The first two may fall within service or transactional communication depending on the circumstances. The third is promotional and should not be treated as a 1601 call.

What Does the 1601 Number Look Like?

The DoT allocation document specifies a 10-digit number from the 1601 series.

The structure is:

1601ABCXXX

The allocation document explains that the numbering resource is organized by telecom service provider and Licensed Service Area, with blocks of numbers allocated to service providers.

It also states that additional numbering resources are subject to utilization requirements.

DoT: Official 1601 Allocation Document

For businesses, the practical point is simple:

You will receive a 10-digit number from the 1601 series through your telecom service provider.

What Does Your Telecom Operator Need to Do?

The immediate operational responsibility sits largely with the telecom service provider.

Before assigning a 1601 number, the provider must verify the eligible entity and obtain an undertaking confirming that the number will be used only for service and transactional voice calls.

The DoT order also requires telecom service providers to assign only 10-digit numbers from the 1601 series.

Department of Telecommunications: 1601 Allocation Requirements

For businesses, this means you should start working with your telecom provider instead of waiting until the final weeks of the implementation period.

Can a Cloud Telephony Provider Give You a 1601 Number?

This is an important point for businesses using cloud telephony.

The uploaded Direction states that the numbering resource is allocated to eligible entities rather than being treated as a pooled resource by intermediaries or aggregators.

So businesses should be careful about vendors making claims such as:

“We will give you our 1601 number.”

The safer structure is:

Your business receives the eligible number through the telecom service provider, while your cloud telephony platform manages the calling infrastructure.

A cloud telephony platform can then help with functions such as:

• IVR
• Call routing
• Agent management
• CRM integration
• Call recording
• Call tracking
• Call disposition
• Reporting
• Call monitoring

This distinction matters because the numbering resource and the technology used to operate calls are two different things.

What Does This Mean for Courier and Logistics Companies?

For courier and logistics businesses, the change is particularly relevant because customer communication happens throughout the delivery process.

A typical customer journey may include calls about:

• Delivery confirmation
• Address clarification
• Failed delivery attempts
• Rescheduling
• Pickup confirmation
• Shipment status
• Delivery coordination

These calls can involve multiple teams, locations, and telecom numbers.

Moving eligible corporate service calls to a dedicated numbering series can make it easier for customers to recognize the business calling them.

However, there is an important limitation.

1601 Does Not Automatically Solve Last-Mile Calling

A delivery executive may still need to contact a customer directly while standing outside the customer’s location.

That type of last-mile communication may involve a delivery partner’s handset or a number-masking solution.

Therefore, businesses should not treat 1601 as a complete solution for every delivery-related communication.

A better approach is to combine the appropriate calling setup with:

• Number masking
• In-app calling
• Delivery notifications
• SMS updates
• Customer verification
• Clear caller identification

What Should Utility Companies Do?

Utility companies often make large volumes of customer calls related to existing services.

For example:

• Electricity bill reminders
• Service requests
• Meter-related communication
• Planned maintenance
• Water supply updates
• Gas service information
• Complaint follow-ups

These businesses should first identify which outbound calls qualify as service or transactional communication and separate them from promotional activity.

The next step is to speak with the telecom service provider about 1601 allocation and the required documentation.

What Should Businesses Do Before the Deadline?

Instead of waiting for the final weeks, businesses should treat the migration as a structured project.

Step 1: Confirm Your Eligibility

Check whether your business falls within the sectors covered by the first phase.

If your business does not clearly fit the listed categories, ask your telecom provider for confirmation.

Step 2: Contact Your Telecom Provider

Speak with your telecom account manager or service provider and ask about:

• 1601 eligibility
• Number allocation
• Required documents
• Undertaking format
• Number quantity
• Implementation timeline
• Technical requirements

Step 3: Audit Your Existing Numbers

Create a list of all numbers currently used for customer calls.

Then classify each number according to its purpose:

Calling Purpose	Example	Action
Service	Bill-related call	Review for 1601
Transactional	Delivery confirmation	Review for 1601
Promotional	New product offer	Keep separate
Internal	Employee-to-employee calls	Review separately
Last-mile delivery	Delivery executive calling customer	Evaluate masking/in-app options

This audit will help prevent promotional calls from accidentally being routed through the wrong number.

Step 4: Separate Service and Promotional Calling

This should be one of your highest priorities.

Your dialer, CRM, SIP setup, and cloud telephony platform should clearly distinguish between service/transactional traffic and promotional traffic.

A simple configuration mistake could result in the wrong type of call being placed from a 1601 number.

Step 5: Configure Your Cloud Telephony System

Once the number is allocated, configure your communication infrastructure.

This may include:

• IVR
• Call routing
• SIP or cloud telephony integration
• CRM
• Call recording
• Agent queues
• Call reports
• Call disposition
• Number-wise reporting

Step 6: Test Before Full Migration

Do not move every customer-facing workflow at once.

Start with a small group, such as:

• One region
• One business unit
• One customer service team
• One delivery operation

Test the complete call flow before expanding it.

Step 7: Update Customer-Facing Information

Once your new calling identity is operational, update relevant customer touchpoints.

These may include:

• Website
• Mobile app
• Customer invoices
• Bills
• IVR announcements
• Help centre
• Email communication
• Customer support scripts

Your support team should also know that customers may ask whether a call from a 1601 number is genuine.

What About the 8 November 2026 Deadline?

The Direction gives Access Providers a 90-day period from 10 August 2026 for onboarding the eligible entities covered by Phase-I.

That puts the end of the 90-day period at approximately 8 November 2026.

The uploaded source also notes that Access Providers have reporting obligations during this implementation period.

Businesses should therefore avoid waiting until the final few days.

However, there is an important distinction:

The current 1601 Direction should not be described as already imposing the same post-deadline calling prohibition that applies to certain 1600-regulated entities.

The 1600 framework has included mandatory adoption requirements and restrictions for covered entities after their respective deadlines.

For 1601, businesses should follow the current Direction and monitor any subsequent TRAI or DoT clarification.

How 1601 Fits Into India’s Telecom Compliance Framework

The 1601 series is part of a broader effort to make commercial communications more identifiable and reduce misuse of telecom resources.

The underlying regulatory framework is the Telecom Commercial Communications Customer Preference Regulations, 2018 (TCCCPR).

TRAI describes TCCCPR as the framework for regulating commercial communications and protecting customers from unsolicited commercial communications.

TRAI: TCCCPR 2018

TRAI has also introduced additional measures and amendments over time to strengthen action against unwanted and misleading commercial communications.

TRAI: TCCCPR Regulations and Amendments

Businesses should therefore look at 1601 as part of a larger compliance process rather than simply as a new phone number.

What Businesses Should Do Now

The 1601 series is not simply another business phone number.

For eligible utilities, courier companies, and logistics businesses, it introduces a more structured way to identify service and transactional calls.

The best approach is to start with the basics:

Check your eligibility, contact your telecom provider, audit your existing calling numbers, separate service calls from promotional calls, and prepare your cloud telephony infrastructure for the new number.

Do not wait until the end of the implementation window to begin.

At the same time, businesses should monitor official updates from TRAI and DoT, because implementation details and requirements may be clarified or expanded as the 1601 rollout progresses.

If your company uses cloud telephony, the goal should not simply be to obtain a 1601 number. Your entire calling system should be configured so that the number is used correctly, service traffic remains separate from promotional traffic, and your team can maintain a clear record of customer communications.

Conclusion

1601 gives eligible non-BFSI and non-government businesses a dedicated identity for service and transactional voice calls.

For utilities, courier companies, and logistics providers, now is the right time to review your calling infrastructure and begin preparing for the transition.

Use the official TRAI and DoT sources as the final reference for compliance decisions, rather than relying only on vendor or third-party interpretations.