If it’s an IP address, you’re restricting it to IPv4 or IPv6. If it’s a name, then it can work on both IPv4 and IPv6. You want pretty much everything but A and

If it’s an IP address, you’re restricting it to IPv4 or IPv6. If it’s a name, then it can work on both IPv4 and IPv6. You want pretty much everything but A and AAAA records to use domain names for pointing, so that they’re not tied to a particular version of IP. Keep the IP resolution to the last step only, and let everything else use domain names.