Country Summary
Country Name | India |
ISO | IN |
Country Code | 91 |
Region | Asia |
MCC (Mobile country code) | 404,405 |
Sender ID Guidelines
Alphanumeric Sender ID |
Not supported |
Numeric Sender ID | Supported only for subscribed Short Codes. If not subscribed, SID change to a random SC. |
Generic Sender ID | Not Supported |
SMS Overview
Vonage supports only International enterprise SMS business to India. According to local regulations of the Telecom Regulatory Authority of India (TRAI), domestic enterprises must submit A2P SMS through domestic connections to end recipients after successful registration with Distributed Ledger Technology (DLT). For more information on Domestic termination please see the press releases from the TRAI here.
International Enterprises are not affected by these DLT regulations. International customers can contact support or their account managers to enable ILDO routing for them if they intend to send pure OTP/Trans or Opt-in promo sms. Alpha Sender ID is not supported for International customers and will be changed to a random short code.
SMS Types
By default, users will fall into the International promotional (SMS without opt-in) category with restrictions as mentioned below.
If you are an International user or have a different SMS type than is listed below, contact your account manager or submit a support request.
Traffic Type | Content Allowed | Sender ID | Restrictions/Regulation |
International (transactional/opted-in promo) |
International originated transactional content & Opt-in Promo content. (If the client registered in India, but the SMS message originated from outside India, it will be identified as International traffic). |
Sender ID not supported and will be changed to a random short/long virtual number. |
For OTP/Transactional traffic mainly. For Opted-in promo, content needs whitelisting through Support or your Account Manager before sending SMS. SMS is Delivered 24/7 via International routes. |
International Promotional (without opt-in) Default route | Promo/Marketing Content | Sender ID not supported and will be changed to a random short/long virtual number. |
Delivery on best effort basis with shared SC from SMS partner. 10am-9pm(IST) delivery to non-NDNC customers only. DLR supported. |
Do Not Call Registry/Do Not Disturb Service
Promotional SMS are barred and will get blocked by operators to numbers those registered in the Indian NDNC (National Do Not Call registry).
SMS delivery is blocked between 21:00 – 10:00 hours IST for end recipients who registered with Do Not Disturb Service (DND). This means promotional SMS can only be delivered only between 10:00 - 21:00 hours IST.
Operators do not support delivery notifications for messages sent via promotional routes with numeric headers.
Additional Information
- Unicode is supported for All India Networks.
- Concatenated SMS is supported for All India Networks.
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Traffic Restriction by Political Reason
Messages towards Jammu and Kashmir networks (for example, 405/55 - Airtel J&K) will be blocked by the government due to political sensitivity. Political SMS is prohibited throughout the country during an election period.
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Limitation to Avoid Potential SMS Flooding
Local regulations specify limitations to the number of messages that can be sent to the same number:
- More than six messages to the same destination number within an hour with the same sender or text may be blocked.
- Users may not receive more than a total of 200 SMS per day across all incoming streams.
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Delivery Receipts
- Transactional/OTP Traffic: DLR is supported and its reliable delivery receipts.
- Promotional Traffic: DLR is not supported, or its unreliable Network DLR.
For more information, see the following articles:
Articles in this section
- Afghanistan SMS Features and Restrictions
- Bangladesh SMS Features and Restrictions
- Bhutan SMS Features and Restrictions
- British Indian Ocean Territory SMS Features and Restrictions
- Brunei Darussalam SMS Features and Restrictions
- Cambodia SMS Features and Restrictions
- China SMS Features and Restrictions
- Hong Kong SMS Features and Restrictions
- India SMS Features and Restrictions
- Indonesia SMS Features and Restrictions