Cannot add website with dash sign "-" in domain name

Hi, i have few domains which names contain “-” sign, like
When i try add site to Cloudflare , i got message “ is not a registered domain (Code: 1049)”
But domains are registered, and there is no security protection.
How can i add them ? thanks
P.S. with other domains, which names does not contain “-” sign all is ok.

Why would you think it is the hyphen?

The search is your friend → Community Tip - Fixing Code: 1049 is not a registered domain

i have changed NS to default of registrar (as said in link that you provide), and it works.
Thank you very much :slight_smile: