Which DNS record type holds IPv6 address information?

The AAAA record type is specifically designed to hold IPv6 address information. This record type is used in the Domain Name System (DNS) to map a domain name to its corresponding IPv6 address. As the transition from IPv4 to IPv6 continues, the AAAA record becomes increasingly important, allowing devices and services using IPv6 to resolve hostnames to their respective addresses.

In contrast, the A record is used for mapping domain names to IPv4 addresses, which means it is applicable only to the older 32-bit IP address format. The CNAME record acts as an alias for another domain name, directing queries to a target domain instead of containing actual IP address data. Lastly, the PTR record is utilized for reverse DNS lookups, associating an IP address with a domain name, but it does not store the actual IP address itself. This makes AAAA the correct choice for representing IPv6 address information in DNS records.