30450: Message delivery blocked
The destination number you are trying to reach is temporarily blocked from receiving this message.
INVALID_CORRELATION_ID: The correlation_id field is not a valid 32-character UUID. Each correlation_id should be a unique identifier, exactly 32 characters long, to map the response to the original request.
INVALID_COUNTRY_ISO_CODE: The country_iso_code is not a valid ISO 3166-1 alpha-2 country code. This field should be a 2-character uppercase string (e.g., "US" for the United States).
INVALID_CONTACT_ID: The contact_id field is not in the correct E.164 format. A valid phone number in E.164 format should include a "+" sign followed by the country code and the subscriber number, with no spaces or other characters (e.g., +14155552671).
INVALID_ZIP_CODE: The zip_code field is not a valid postal code. The zip code should conform to the format used in the corresponding country as indicated by the country_iso_code.
INTERNAL_SERVER_ERROR: This error indicates an internal server issue that caused the upsert process to fail. Please retry the request.
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Ensure the correlation_id is a valid 32-character UUID. Use a UUID generator if necessary.
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Ensure the contact_id is a valid phone number in E.164 format.
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Confirm the country_iso_code: Ensure the country_iso_code follows the ISO 3166-1 alpha-2 standard (e.g., "US").
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Ensure the zip_code matches the postal code format for the specified country.
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If an internal server error occurs, retry the request after some time.
Twilio's support team can help investigate what went wrong with upserting your contacts. Please collect 3 or more correlation_id from the last 24 hours that were flagged with Error 30647, and open a support request.