DNS64 is a DNS service that synthesizes AAAA answers from A records for use with NAT64.
What is DNS64?
DNS64 is a DNS service that synthesizes AAAA answers from A records for use with NAT64. It is part of the practical vocabulary used by administrators, developers and IT teams. Understanding it helps identify where the technology sits in an architecture and what problem it is intended to solve.
What is it used for?
It is mainly used to allow IPv6-only clients to resolve IPv4 destinations. In production, its usefulness depends on the surrounding configuration, compatibility requirements and operational constraints.
How to recognize it in practice
You may encounter DNS64 in product interfaces, configuration files, logs, API documentation, network diagrams or troubleshooting procedures. Always check the context before changing a setting based only on its name.
Points to watch
DNSSEC and applications using literal addresses can complicate its use. Test changes, document the previous state and keep a rollback path for production systems.
In short
DNS64 = a DNS service that synthesizes AAAA answers from A records for use with NAT64. Its main value is to allow IPv6-only clients to resolve IPv4 destinations.