Is it possible that IPv4 format IP address is really on a (ipv6 format) DNSv6 server?

Question

Is it possible that an IPv4 format IP address is based on a (IPv6 format) DNSv6 server?

How would I determine this?

Answer 1

I think what you're trying to ask is "Can an DNSv6 server distribute IPv4 addresses?", and the answer is yes, it can! To understand it better, there are two different types of basic records that differentiate IPv4 from IPv6 records: A records and AAAA records. If a DNS server receives a query like this:

google.ca.              IN  A

Then the server will respond with

google.ca.        300   IN  A     173.194.32.104

because the client is asking for the A record, which is an IPv4 record. However, if the DNS server receives a query like this,

ipv6.google.com.          IN  AAAA

then the server will respond with the IPv6 address, as the client requested the AAAA record:

ipv6.google.com.    300   IN  AAAA  2001:4860:800b::93

Hope that helps!