Why are my SMS messages to India undelivered?


  • Why are my SMS messages to India undelivered?
  • Why can't I send SMS in India?
  • Error code 1 Unknown
  • No delivery in India
  • Very low delivery in India
  • Undelivered in India
  • How do I get delivery in India?
  • How can I register with the NDNC?


The most probable cause for this is that your recipients are registered with India's NDNC (National Do Not Call) list.


India is a very complex market as far as regulations are concerned and if you do not comply with them your SMS will not be delivered. Very few numbers in India are not registered with the NDNC register, so you may still see some small levels of delivery, but most of your SMS will be undelivered.



To bypass the filters and restriction.......

For International customer, You can request to move to international routing at a higher cost.

For Domestic customers, you can register your Sender ID and need to be DLT compliant.

For complying to DLT and register sender IDs please visit India .

Please see this other KB article on India for more information on the other region-specific regulations that may be limiting your SMS delivery in India.


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