What is Twilio Error 30003?

Error 30003 is the Twilio error for an unreachable destination handset. The carrier network could not deliver the message to the phone.

Common causes

• The phone is off or out of signal.
• The number cannot receive SMS, for example a landline.
• The phone is roaming outside its home network.
• For short codes, the recipient's plan does not support short code messages.

How to fix it

1. Send the message again.
2. Ask the recipient to check that the phone is on, has signal and gets SMS from other senders.
3. Remove landlines and other numbers that cannot receive SMS from your list before you send.
4. If a long code or toll-free number fails again and again, check the content and use case: repeated failures can be filtering. See error 30007.