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Twilio is a cloud communications platform that enables developers to build, scale, and operate real-time communications within their software applications. It provides APIs for SMS, voice, video, and other communication channels, allowing seamless integration into applications. Twilio's SMS API is widely used for sending and receiving text messages globally.
When using Twilio's SMS API, you might encounter Error 30004. This error indicates that a message delivery attempt has failed. The symptom observed is that the message does not reach the intended recipient, and the error code 30004 is returned in the response from Twilio's API.
Error 30004 is associated with message delivery failure due to an unknown destination carrier. This means that Twilio attempted to deliver the message, but the carrier responsible for the recipient's phone number could not be identified. This can happen if the phone number is incorrect, inactive, or not supported by Twilio's carrier network.
To resolve Error 30004, follow these actionable steps:
Ensure that the recipient's phone number is correct and follows the international E.164 format. This format includes the country code, area code, and the local number. For example, a US number should be formatted as +12345678900.
Confirm that the phone number is active and capable of receiving SMS messages. You can use Twilio's Lookup API to check the carrier and line type of the phone number.
If possible, test sending the message to a different phone number that you know is active and correctly formatted. This can help determine if the issue is specific to the original number.
If the issue persists, consider reaching out to Twilio Support for further assistance. Provide them with the error code, the phone number in question, and any relevant logs or details.
By following these steps, you should be able to resolve Error 30004 and ensure successful message delivery using Twilio's SMS API. Always ensure that phone numbers are correctly formatted and active to avoid similar issues in the future.
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