My domain name ends in ".io" - is that considered an invalid host name?

When I try to add my domain name in my DO control panel I keep getting an “invalid hostname” error. My domain name ends in “.io” - why is this invalid?

Submit an answer

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

Sign In or Sign Up to Answer

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.


The .io domain extension shouldn’t be invalid by any means. I own a few domains with this extension and they’re setup + working on DigitalOcean as I write this post.

I did just test to see if an error would pop up when adding another. I chose a domain that isn’t actually setup,, and it was added without any issues.

If you’re unable to add a domain through the control panel, I would recommend submitting a support ticket and let them know of the issue so they can see if there’s details that they can provide you with.