Updates to Alphanumeric Sender ID Compliance Checks and Error Codes

At Twilio, we’re always working to make your messaging experience more reliable and transparent. That’s why we’re making some updates to how we handle Alphanumeric Sender IDs.

What’s Happening?

Starting on July 14, 2025, we’re introducing clearer error codes and new message status updates when an Alphanumeric Sender ID isn’t properly registered or authorized in a given country. These updates will help you quickly understand if something needs to be fixed and keep your messages flowing smoothly.

Here are the highlights:

• *New Error Codes

  • 30041: Sent when the Alphanumeric Sender ID isn’t registered or authorized for use.

  • 30042: Sent when the Alphanumeric Sender ID is explicitly blocked because it’s generic or not allowed to be used.

•  What Will Change in Your Logs?

  • Messages with unregistered Alpha Sender IDs will now appear as “Likely-SCAM” in the logs in Singapore and Ireland.

  • Error codes will be clearer and more actionable.

If your Alphanumeric Sender IDs are already registered and approved for your destinations, you’re all set—no action needed! If you see one of these new error codes, that’s your cue to double-check that your Alphanumeric Sender ID is properly set up for the country you’re sending to.

*Note: Error codes are subject to processing fees. For more information on charges on messaging errors, visit our Twilio Help Center article on error code fees.

For questions or help with registering your Alphanumeric Sender IDs visit:

• SMS Guidelines Page

• Twilio Help Center