Rate this page:

Error 21608

Error - 21608

This number can send messages only to verified numbers

You have attempted to send a message to an unverified phone number while using a trial account.

To prevent spam, trial accounts can only send messages to phone numbers you've verified with Twilio. You must upgrade your account to remove this restriction.

Possible solutions

  • Verify the phone number you wish to reach via the Twilio console. See step-by-step instructions in our guide to working with your trial account. Note that you will need access to this device to receive the call or text with your verification code.
  • Upgrade your Twilio trial account to a full paid account to remove this restriction by providing your payment information via credit card or Paypal on the console billing page.
Rate this page:

Thank you for your feedback!

We are always striving to improve our documentation quality, and your feedback is valuable to us. Please select the reason(s) for your feedback or provide additional information about how we can improve:

Sending your feedback...
🎉 Thank you for your feedback!
Something went wrong. Please try again.

Thanks for your feedback!

Refer us and get $10 in 3 simple steps!

Step 1

Get link

Get a free personal referral link here

Step 2

Give $10

Your user signs up and upgrade using link

Step 3

Get $10

1,250 free SMSes
OR 1,000 free voice mins
OR 12,000 chats
OR more