Error 30006 occurs when an SMS cannot be delivered because the destination number is unable to receive the message. This most commonly happens when the number is a landline or when the destination carrier cannot be reached for that number type.

TABLE OF CONTENTS

What Is Error 30006?

Error 30006 means the destination number cannot receive the message through the selected messaging route.

This can happen when:

  • The destination is a landline.

  • The number type does not support SMS.

  • The recipient’s carrier is unreachable.

  • A short code or other specialized number type cannot be delivered through the destination carrier.

Key Benefits of Troubleshooting Error 30006

Understanding the destination number type helps you avoid repeat failures and choose a communication method the recipient can actually receive.

  • Fewer Failed Messages: Avoid sending SMS to unsupported destinations.

  • Better Contact Data: Identify landlines and other non-SMS-capable numbers.

  • Improved Deliverability: Separate carrier-routing issues from message-content problems.

  • More Reliable Automation: Prevent workflows and campaigns from repeatedly sending to unreachable destinations.

Common Causes of Error 30006

Error 30006 may occur when:

  • The destination number is a landline.

  • The number is not capable of receiving SMS.

  • The recipient’s carrier cannot be reached for that number type.

  • The destination is a short code that cannot be delivered through the carrier.

  • The contact record contains an outdated or incorrect number type.

How to Fix Error 30006

Start by confirming the type of destination number.

  1. Open the affected contact record.

  2. Confirm whether the destination is a mobile number or landline.

  3. Verify that the number is capable of receiving SMS.

  4. Confirm the phone number is entered correctly.

  5. If the number is a landline, use a valid mobile number instead.

  6. If the destination uses a specialized number type, confirm that the recipient’s carrier can receive messages from it.

  7. Retry only after confirming the destination is SMS-capable.

Check Whether the Number Is a Landline

Landlines generally cannot receive standard mobile SMS.

If the destination is a landline:

  • Do not continue retrying the same SMS.

  • Request a mobile number from the contact when appropriate.

  • Use another supported communication channel, such as voice or email.

Changing the number formatting will not make a landline SMS-capable.

Check Carrier Reachability

A valid number may still be unreachable if the recipient’s carrier does not support the messaging route being used.

This can be more common with:


  • Short codes

  • Specialized messaging number types

  • Certain carrier routes

If the destination appears valid and SMS-capable but failures continue, the issue may be carrier-related rather than contact-related.

Check Workflows and Campaigns

If Error 30006 appears during automated sends, review the destination data being used.

Check:

  • Contact phone fields

  • Imported contact lists

  • Workflow recipient fields

  • Campaign recipient lists

  • Custom phone fields

  • Landline numbers stored as primary SMS numbers

Correcting the source data can help prevent repeated failures.

Frequently Asked Questions

Q: What does Error 30006 mean?
It means the destination number cannot receive the message, usually because it is a landline or the carrier route is unavailable.

Q: Can a landline cause Error 30006?
Yes. Landlines are a common cause because they generally cannot receive standard SMS.

Q: Is the phone number always invalid?
No. The number may be valid but unable to receive SMS.

Q: Can a carrier issue cause Error 30006?
Yes. The destination carrier may be unreachable for the number type being used.

Q: Can a short code trigger this error?
Yes. Some short code routes may not be reachable through certain carriers.

Q: Should I keep retrying the same message?
Not if the number is a confirmed landline or unsupported destination. Retry only after verifying that the destination can receive SMS.

Need Help?

If Error 30006 continues, first confirm whether the destination is capable of receiving SMS.

Verify that:

  • The destination number is correct.

  • The number is mobile-capable.

  • The number is not a landline.

  • The recipient can receive SMS.

  • The correct phone field is being used.

  • Imported or form-submitted phone data is accurate.

  • The destination carrier is reachable for the number type being used.

  • A workflow or campaign is not repeatedly sending to the same unsupported number.

If the destination is a landline, use another supported communication method instead of SMS.

If the issue continues, collect the sending number, destination number, number type if known, recipient carrier if known, message timestamp, workflow or campaign name if applicable, and a screenshot of Error 30006 before contacting support.