Is the original domain name registered with that original hosting provider? In that case I see you would not be able to control the DNS records. Otherwise I think you should be able to set the original domain name to the new IP address. There might still be a way but might be troublesome. One of the use cases for domain names is the ability to point an existing name to a different host. I was curious because I was thinking about how DNS might be a weak point for nostr. DNS could be superfluous and therefore an unnecessary risk if the same thing that you experienced is common: losing access to the domain name controls when losing access to hosting. DNS, as Moxie pointed out a while ago, is "distributed" in the sense that the data are distributed, but the trust is centralized. DNS takedowns are a common censorship technique. Nostr might be better off using IP addresses directly, but that leads back to HTTPS/TLS and trying to get a TLS certificate where the common name is the IP address. Let's Encrypt, for example, won't issue a certificate for a non-DNS name such as an IP address.