Cannot restore deleted subdomain and create new one

dynDNS at dedyn.io
1

I have a free account with limited subdomain to 1.

I tried to create another subdomain and deleted previous one.

Unfortunatelly I cannot add any domain now, even old one

Looks like dedyn i not usable for me at the moment

2

I suppose you want to create a dedyn.io subdomain. In that case, enter the full domain you want to create (yoursubdomain.dedyn.io), not just the subdomain part. You can use deSEC to host domains other than dynamic DNS subdomains, but it won’t let you host a top level domain, which is what entering just the subdomain part looks like to the system.