What is IPv6 (Internet Protocol version 6)?

How does IPv6 work?

Every device communicating over an IP network needs an IP address. IPv6 provides approximately 340 undecillion possible addresses, compared with IPv4’s roughly 4.3 billion addresses.

IPv6 addresses use hexadecimal characters separated by colons, such as 2001:db8::1. IPv6 also supports DNS resolution through AAAA records, which map domain names to IPv6 addresses. This allows devices and applications to locate services using familiar domain names rather than needing to know their IP addresses.

What is the difference between IPv4 and IPv6?

IPv4 uses 32-bit addresses, while IPv6 uses 128-bit addresses. This larger address space helps organizations accommodate growing networks without relying as heavily on workarounds such as network address translation (NAT). IPv6 also introduces changes to addressing, routing, and network communication.

IPv4 and IPv6 can coexist during migration, allowing organizations to transition their networks in stages rather than replacing everything at once.

Why is IPv6 important for DNS and network management?

As organizations adopt IPv6 across data centers, cloud environments, and connected devices, DNS, DHCP, and IP address management (IPAM) systems must support IPv6 addressing and records. Network teams need visibility into IPv6 address space, accurate DNS records, and consistent configuration across network services.

Managing IPv4 and IPv6 together can introduce operational complexity, particularly when legacy infrastructure and applications have different levels of IPv6 support.

BlueCat Integrity supports IPv6 address management and DNS, DHCP, and IPAM workflows, helping organizations manage IPv6 networks alongside existing infrastructure.

Learn more: Ease your transition to IPv6 DNS