---
title: "India (+91) Country Calling Code & SMS Numbering Plan"
---

India (+91) Country Calling Code & SMS Numbering Plan: SMSRiver

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- India (+91)

National Telecom Specification

# India (+91) Country Calling Code & SMS Guide

Complete engineering reference for phone numbering formats, domestic trunk prefixes, cellular mobile operator allocations, and regulatory A2P SMS requirements in India.

Quick Jump:
[Numbering Plan](#numbering-plan)
[A2P Regulations](#sms-regulations)
[Verify IN Number](#inspector-cta)

Country Dialing Code
+91
ISO: IN

Domestic Trunk Prefix
0
Omitted internationally

National Length
10 digits (mobile)
Local subscriber digits

Full E.164 Length
12 digits (+91 xxxxx xxxxx)
With +91 prefix

## Telephony Architecture & Carrier Allocations

Destination Codes:
STD Area Codes, Mobile 6/7/8/9

Mobile Prefix Patterns:
6xxx, 7xxx, 8xxx, 9xxx allocated by DoT across telecom service circles (LSA)

Major Mobile Network Operators:
Reliance Jio, Bharti Airtel, Vodafone Idea (Vi), BSNL

## A2P Messaging Regulations & Firewall Policies

A2P 10DLC & Campaign Registration
Not applicable. Governed by TRAI Telecom Commercial Communications Customer Preference Regulations (TCCCPR).

Alphanumeric Sender ID Support
Supported as 6-character alphabetic headers for transactional traffic. Strictly requires registration on carrier DLT (Distributed Ledger Technology) platforms.

Two-Way Messaging Capability
Supported via registered long codes (10 digits) or virtual mobile numbers.

Character Encoding Standards
GSM-7 for Latin text; UCS-2 for Devanagari and regional Indian scripts.

Compliance Framework: TRAI DLT registration of Principal Entity (PE), Header/Sender ID, and Content Templates. Unregistered messages are filtered at carrier gateways.

Interactive Number Intelligence

### Test a India Number Now

Check if a India phone number conforms to the national numbering plan, classify mobile vs VoIP allocation, and obtain canonical E.164 standardization.

Inspect Number →

## Frequently Asked Questions for India

### What is the international calling code for India?

India's country calling code is +91. Mobile numbers consist of 10 digits starting with 6, 7, 8, or 9.

### What is TRAI DLT registration for sending SMS to India?

TRAI mandates that all commercial entities register their business identity, sender headers, and message content templates on a blockchain-based DLT platform with Indian carriers before sending A2P messages.

### Related National Calling Codes

[Australia
+61](/country-codes/australia/)

[Austria
+43](/country-codes/austria/)

[Belgium
+32](/country-codes/belgium/)

[Brazil
+55](/country-codes/brazil/)

[Canada
+1](/country-codes/canada/)

[France
+33](/country-codes/france/)

[Germany
+49](/country-codes/germany/)

[Indonesia
+62](/country-codes/indonesia/)

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