INDIA (IN)

Locale Summary

Locale name	India
ISO code	IN
Region	Asia
Mobile country code	404, 405
Dialing code	+91

Guidelines

Two-way SMS supported	No
Number portability available	Yes
Twilio concatenated message support	Yes
Message length	160 characters
Twilio MMS support	Converted to SMS with embedded URL
Sending SMS to landline numbers	You cannot send SMS to a landline destination number: the Twilio REST API will throw a 400 response with error code 21614, the message will not appear in the logs, and the account will not be charged.
Compliance considerations	To ensure Twilio is in compliance with local regulation, domestic transactional, domestic promotional, and international SMS messages are sent through mobile operators’ International Long Distance Operator (ILDO) connections. Pre-registered Alphanumeric Sender IDs are not supported and messages are delivered with random ILDO-approved short codes in the format `5NNNN—5NNNNNNNN` (e.g., 54321). Messages will bypass India’s Do-Not-Disturb (DND) database and will be delivered without any time-of-day restrictions. Twilio strongly encourages customers to review proposed use cases with qualified legal counsel to make sure that they comply with all applicable laws. The following are some general best practices: Get opt-in consent from each end-user before sending any communication to them, particularly for marketing or other non-essential communications. Only communicate during an end-user’s daytime hours unless it is urgent. SMS campaigns should support HELP/STOP messages, and similar messages, in the end-user’s local language. Do not contact end-users on do-not-call or do-not-disturb registries. Sending gambling related content is strictly prohibited.

Phone Numbers & Sender ID

	Alphanumeric		Long Code		Short Code
	Pre-registration	Dynamic	Domestic	International
Operator network capability	Not Supported	Not Supported	Not Supported	Not Supported	Supported
Twilio supported	Not Supported	---	---	Supported	Not Supported
Sender ID preserved	---	---	---	No	---
Provisioning time	N/A	N/A	N/A	N/A	N/A
UCS-2 support	N/A	N/A	N/A	Supported	N/A
Use case restrictions	N/A	N/A	N/A	Any Numeric Sender ID sent to Indian mobile subscribers will be overwritten with a random short number between five and nine digits long of the format `5NNNN—5NNNNNNN`.	N/A
Best practices	N/A	N/A	N/A	N/A	N/A

	Alphanumeric - Pre-registration
Operator network capability	Not Supported
Twilio supported	Not Supported
Sender ID preserved	---
Provisioning time	N/A
UCS-2 support	N/A
Use case restrictions	N/A
Best practices	N/A

	Alphanumeric - Dynamic
Operator network capability	Not Supported
Twilio supported	---
Sender ID preserved	---
Provisioning time	N/A
UCS-2 support	N/A
Use case restrictions	N/A
Best practices	N/A

	Long Code - Domestic
Operator network capability	Not Supported
Twilio supported	---
Sender ID preserved	---
Provisioning time	N/A
UCS-2 support	N/A
Use case restrictions	N/A
Best practices	N/A

	Long Code - International
Operator network capability	Not Supported
Twilio supported	Supported
Sender ID preserved	No
Provisioning time	N/A
UCS-2 support	Supported
Use case restrictions	Any Numeric Sender ID sent to Indian mobile subscribers will be overwritten with a random short number between five and nine digits long of the format `5NNNN—5NNNNNNN`.
Best practices	N/A

	Short Code
Operator network capability	Supported
Twilio supported	Not Supported
Sender ID preserved	---
Provisioning time	N/A
UCS-2 support	N/A
Use case restrictions	N/A
Best practices	N/A

For the benefit of all our customers, these guidelines are provided to help you comply with applicable requirements and to help ensure Twilio's platform remains compliant with global telecommunications ecosystem requirements. These guidelines represent our current understanding of common compliance requirements generally applicable to Twilio and its customers, and do not constitute legal advice. By posting these guidelines, Twilio makes no assurances regarding the legal compliance of your application built using our APIs. You are expected to understand and abide by all compliance obligations applicable to your specific application. You should check these pages regularly for updates as telecommunications ecosystem requirements continue to evolve and change, and the information below may be updated or changed without notice.