30005: Unknown destination handset

This delivery error indicates that the destination number is unknown and may no longer exist. Twilio receives this status from carrier partners and returns it to you.

• The destination number is unknown and may no longer exist.
• The device is powered off or has insufficient signal.
• The destination number cannot receive SMS messages, such as when the number is a landline.
• An issue at the mobile carrier is preventing delivery.

• Send another test message with a REST API request to confirm whether the error persists.
• Verify the destination number is in proper E.164 format with the correct country code and subscriber number.
• Check the recipient's device and network conditions, such as power, signal strength, and whether the device is on its home network (not roaming).
• Test whether the recipient can receive non‑Twilio SMS and whether another Twilio number or a shorter one‑segment message is received.
• If the issue persists, collect at least three recent Message SIDs that show error 30005, then open a support ticket with Twilio.

• Debugging Tools
• Track the Message Status of Outbound Messages
• What is E.164?