Calculate IPv6 subnets, prefix lengths, and address ranges
An IPv6 subnet calculator takes the endless sea of hexadecimal addresses and turns it into a manageable ip address calculator experience. Instead of juggling 128-bit numbers by hand, the tool expands, compresses, and annotates every ipv6 subnet you enter. It’s like having a cidr calculator, ipv6 netmask calculator, and ip range calculator online—all tuned specifically for the modern internet.
Because IPv6 uses prefix lengths rather than dotted masks, this calculator shows the network prefix, interface ID, address type, and scope as soon as you slide to /48, /56, /64, or any custom value. You can compare ipv4 vs ipv6 behavior, see how many /64 subnets live inside a /48, and understand exactly how addresses expand in full notation. It’s perfect for anyone who needs an ip6 calc, subnet calculator for ipv6, or an inverse mask calculator built for larger address spaces.
Behind the scenes, the calculator follows RFC 4291 rules for compression and scope, so what you see here matches what routers, firewalls, and cloud platforms expect. The result is a friendly, human-written guide that keeps ipv6 calculator tasks approachable for architects, students, and security teams alike.
Whether you’re planning a new /48, validating a vendor design, or preparing for certification exams, this ipv6 subnet mask calculator keeps every detail in one place. No spreadsheets. No guessing. Just clean, accurate data you can trust.
Enter any IPv6 prefix—shortened or fully expanded. The ip6 subnet calculator expands it instantly, so you can inspect every quartet without worrying about typos.
Use the slider to pick any prefix between /0 and /128. The calculator updates the network range, interface ID, total addresses, and number of /64 subnets in real time—ideal for calculate ipv6 subnet tasks.
Copy the expanded address, export JSON, or jump to the related IPv4, CIDR, or range calculators. Every output is ready to drop into design docs, firewall rules, or terraform modules.
Translate compressed IPv6 addresses into full notation instantly, so documentation and troubleshooting stay consistent.
Visualize how many /64s fit inside a /48 or /56, making VLSM-style IPv6 planning intuitive for every network engineer.
Jump to the IPv4 calculator or wildcard tool to compare addressing schemes and keep hybrid environments aligned.
Results follow RFC 5952 and 4291 rules, so what you copy into configs matches best-practice formatting.
Everything runs in your browser—no addresses are uploaded—keeping your ip network calculations private.
Plain-language explanations help students grasp ipv6 subnetting mask calculator concepts without getting lost in jargon.
Drag to any /0–/128 length to see exactly how address ranges expand or collapse, just like a cidr range calculator but tuned for IPv6.
Instantly know whether an address is global unicast, link-local, unique local, or multicast, helping you validate ip address and subnet calculator results.
Switch between full and shorthand IPv6 formats, keeping both human readers and CLI commands happy.
Capture outputs for automation pipelines, design reviews, or compliance evidence in a single click.
Links to ipv4 calculators, wildcard tools, and range calculators keep your entire IP strategy connected.
The same content-section styling as the IP lookup page ensures consistency, clarity, and accessibility across devices.
Plan AWS, Azure, or GCP IPv6 ranges, double-check cidr notation calculator output, and document prefixes for multi-region deployments.
Verify that firewall or ACL entries cover the correct ip range and subnet mask combination before you go live.
Carriers can divide delegated /32 or /29 blocks into subscriber /48s without spreadsheets or guesswork.
Students practicing ip calculator online labs get instant feedback on compression rules, scope IDs, and interface IDs.
Compare IPv4 subnets with their IPv6 counterparts to ensure dual-stack designs stay aligned.