🔢 128-Bit IPv6 Routing & SLAAC Engine
IPv6 Subnet Calculator & Address Expander
Expand, compress (RFC 5952), and subnet 128-bit IPv6 CIDR address blocks, identify scope types, and compute EUI-64 addresses.
Sample Blocks:
Documentation /64
Cloudflare /48
Link-Local (fe80::1/10)
Loopback (::1/128)
Subnet Network Prefix & Range
2001:0db8:85a3:0000:: – 2001:0db8:85a3:0000:ffff:ffff:ffff:ffff
Full 128-Bit Expanded Form (8 Octets)
2001:0db8:85a3:0000:0000:8a2e:0370:7334
Compressed Standard Form (RFC 5952)
2001:db8:85a3::8a2e:370:7334
Address Scope / Type:
Global Unicast (2000::/3) - Publicly Routable Internet Address
Prefix Bitmask Length:
64 Routing Bits / 64 Host Bits
EUI-64 MAC-to-IPv6 Interface ID Converter:
MAC:
EUI-64:
IPv6 Address Types & Architecture
- Global Unicast (2000::/3): Globally unique, publicly routable Internet addresses.
- Unique Local (fc00::/7 & fd00::/8): Private intranet addresses equivalent to IPv4 RFC 1918.
- Link-Local (fe80::/10): Automatically assigned within a single local network segment.
- Loopback (::1/128): Equivalent to IPv4
127.0.0.1.