Hello. In order to add my dedyn.io subdomain to vercel (https://vercel.com) for deploying my website, I attempted to add an A record 76.76.21.61 to the domain, but was prompted that it was not allowed. Can you unlock it? Thank you very much.
Hi lazytong,
Thank you for your message, and welcome to deSEC! 
Domains under .dedyn.io are meant for dynDNS usage, when IP addresses change dynamically. (This is usually the case in residential settings.)
The IP address you mentioned is not a residential IP address, and we’ve previously seen abusive content from this subnet. The IP range is therefore blocked from usage with .dedyn.io.
If you’d like to use this IP address, you will need to register a domain name elsewhere. (You can then delegate your domain to deSEC and use our platform for DNS management.)
Thank you for understanding!
Stay secure,
Peter
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