Analyze IPv6 prefixes with detailed range, split, and address-format insights.
Last Updated: 16 Mar 2026
Compressed: 2001:db8:abcd:12::1234
Expanded: 2001:0db8:abcd:0012:0000:0000:0000:1234
Network: 2001:db8:abcd:12::/64
Last address in prefix: 2001:db8:abcd:12:ffff:ffff:ffff:ffff
Address type: Global Unicast
Total addresses in /64: 2^64
Subnet split to /72: 256 subnets
Network prefix hex: 2001:0db8:abcd:0012
Interface identifier (IID): 0000:0000:0000:1234
Reverse pointer: 4.3.2.1.0.0.0.0.0.0.0.0.0.0.0.0.2.1.0.0.d.c.b.a.8.b.d.0.1.0.0.2.ip6.arpa
IPv6 Subnet Calculator helps you analyze ipv6 prefixes with detailed range, split, and address-format insights. It is commonly used by finance teams, founders, individual planners for ipv6 subnet calculator, ipv6 cidr calculator, ipv6 prefix calculator.
Advanced IPv6 Prefix Analysis
Enter any IPv6 CIDR to calculate network boundaries, compressed/expanded forms, and huge address-space capacity.
Included Outputs
- Compressed and expanded IPv6 representation
- Network and last-address boundaries for the prefix
- Address type detection (Global, ULA, Link-local, Multicast, etc.)
- Prefix split planning (for example /64 to /72, /80, /96)
- Reverse pointer format for DNS workflows
Disclaimer: This calculator provides information only and is not financial, tax, or legal advice.