What is the difference between compressed and uncompressed IPv6?

Compressed IPv6 replaces consecutive groups of zeros with `::` and removes leading zeros in each block. Uncompressed IPv6 displays all 8 four-digit hexadecimal blocks (32 characters).

Updated: August 2026 • Verified v1.2

IPv6 Subnet Prefix & Expansion Calculator

Internet & NetworkNetwork

Local Browser Execution: Your input is processed locally in your browser and is not sent to UTL servers.

IPv6 Capacity: Total Addresses = 2^(128 - Prefix Length)

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Understanding Your Results

Expands compressed IPv6 addresses into standard 8-block 32-hex notation, displays address scope (Global Unicast, Link-Local, ULA, Loopback), and computes total address capacity.

Practical Guidance & Next Steps

A standard IPv6 end-user subnet is `/64`, which contains $2^{64}$ (18.4 quintillion) addresses.

What is this?

A networking utility that uncompresses IPv6 addresses and calculates subnet prefix capacities.

How does it work?

1. Enter any IPv6 address with prefix notation (e.g. `2001:db8::1/64`). 2. View full uncompressed 32-character hex notation and address scope. 3. Copy the expanded address and subnet breakdown in 1 click.