Overview
This article addresses whether Twilio customers can use a verified Indian (+91) caller ID, either a Twilio-provisioned number or a non-Twilio number verified through Twilio, for making outbound calls to India or other destinations.
Product
Programmable Voice
Environment
Twilio Console
What You Need to Know
Regulatory Background
Due to local telecommunications regulations in India, Twilio does not support outbound calls originating from Indian numbers (country code +91). This restriction applies to:
- Twilio-provisioned Indian phone numbers
- Non-Twilio Indian numbers added as Verified Caller IDs
Do Not Originate (DNO) Block
As of August 1, 2024, Twilio has implemented a Do Not Originate (DNO) block on all outbound calls from Indian numbers. This means:
- Any attempt to place an outbound call from a +91 number (including verified caller IDs) will be automatically blocked.
- This restriction applies to calls to any destination, whether within India or internationally.
Error Codes
If you attempt to place an outbound call from a +91 number, you may encounter error codes such as:
- 13247: Dial: Invalid From number (caller ID)
The specific error code may vary depending on the Twilio product or API used.
Frequently Asked Questions
Can I use a Twilio Indian number or a verified +91 number as the caller ID for outbound calls?
No, outbound calls from Indian numbers (including verified caller IDs) are not supported due to regulatory restrictions.
Does this restriction apply to both domestic and international calls?
Yes, the restriction applies to all outbound calls from +91 numbers, regardless of the destination.
What happens if I try to make such a call?
The call will be blocked, and you will receive an error code indicating the restriction.
Conclusion
Twilio customers cannot use Indian (+91) numbers, whether Twilio-provisioned or verified as caller IDs, for outbound calls due to regulatory requirements. All such calls are blocked by Twilio’s Do Not Originate policy.
If you have further questions about calling regulations in India or need assistance with alternative solutions, please reach out to Twilio Support.
Below you will find references to useful documents: