30005: Unknown destination handset

This delivery error indicates that the destination number is unknown and may no longer exist. Twilio surfaces this status based on delivery information from carrier partners.

• The destination number you are trying to reach is unknown and may no longer exist.
• The device you are trying to reach is not on or does not have sufficient signal.
• The device cannot receive SMS (for example, the phone number belongs to a landline)
• There is an issue with the mobile carrier

Reproduce the issue by sending another test message using a REST API request, or by using the Send an SMS "Try it out" flow in the Twilio Console (Virtual Phone).

Verify the destination number is formatted in E.164 format: [+] [country code] [subscriber number including area code] and that you are targeting the correct country code and subscriber number.

If you see similar results, continue troubleshooting with the following checklist:

• Is the destination device powered on?
• Does the device have sufficient signal? If not power the device off, wait 30 seconds, and then power it back up.
• Is the device connected to the home carrier's network? We cannot guarantee message delivery on devices roaming off-network.
• Can the device receive non-Twilio SMS?
• Can the device receive messages from another Twilio number (non-Alphanumeric Sender ID), or with a shorter one-segment (non-concatenated) body?
• Can other devices using the same mobile carrier receive your messages?

Twilio's Support team can help investigate what went wrong with delivering your message. Please collect 3 or more message SIDs in your SMS logs from the last 24 hours that were flagged with Error 30005, and open a support request.