IPv6 Address Space
Complete IPv6 unicast address space allocation from IANA by RIR.
| IPv6 prefix | Allocation | Notes |
|---|---|---|
| ::/8 | Reserved by IETF | Partially allocated; see IPv6 Special-Purpose Address Space. ::/96 (IPv4-compatible) was deprecated by RFC 4291. |
| 100::/8 | Reserved by IETF | Partially allocated; see IPv6 Special-Purpose Address Space. |
| 200::/7 | Reserved by IETF | Deprecated December 2004 (RFC 4048). Formerly OSI NSAP-mapped prefix. |
| 400::/6 | Reserved by IETF | |
| 800::/5 | Reserved by IETF | |
| 1000::/4 | Reserved by IETF | |
| 2000::/3 | Global Unicast | Unicast space encompasses the entire IPv6 range except ff00::/8. IANA assignments are currently limited to 2000::/3. |
| 4000::/3 | Reserved by IETF | Partially allocated; 5f00::/8 (with 3ffe::/16) was used for the 6bone, returned per RFC 5156. |
| 6000::/3 | Reserved by IETF | |
| 8000::/3 | Reserved by IETF | |
| a000::/3 | Reserved by IETF | |
| c000::/3 | Reserved by IETF | |
| e000::/4 | Reserved by IETF | |
| f000::/5 | Reserved by IETF | |
| f800::/6 | Reserved by IETF | |
| fc00::/7 | Unique Local Unicast | See IPv6 Special-Purpose Address Space. |
| fe00::/9 | Reserved by IETF | |
| fe80::/10 | Link-Scoped Unicast | See IPv6 Special-Purpose Address Space. |
| fec0::/10 | Reserved by IETF | Deprecated by RFC 3879 (September 2004). Formerly Site-Local. |
| ff00::/8 | Multicast | See IPv6 Multicast Address Space. |
About IPv6 Address Space
Complete IPv6 unicast address space allocation from IANA by RIR.
IPv6 Address Space inspects network details from your browser — enter a host, address or URL and get clear, readable results without touching the command line.
How to Use IPv6 Address Space
- Enter the host, IP address, URL or port you want to inspect.
- Choose any options the tool offers (protocol, count, depth).
- Run the check — results appear as the browser completes the request.
- Copy the report or note down the details you need.
Key Features
- No terminal or admin tools needed — everything happens in the page.
- Clear, readable results instead of raw command output.
- Checks run from your browser, reflecting what a real visitor experiences.
Frequently Asked Questions
Does IPv6 Address Space really check the network?
Yes — IPv6 Address Space uses browser-based requests and lookups to test reachability the way a real visitor would experience it.
Is IPv6 Address Space free to use?
Yes. IPv6 Address Space is completely free with unlimited use — no account, download or payment required.
Is my data uploaded to a server?
No. IPv6 Address Space runs entirely in your browser. Your inputs are never sent to our servers or stored anywhere.
Does IPv6 Address Space work on mobile?
Yes. The interface is fully responsive and works in any modern browser on Android, iPhone, tablets and desktops.
Related Networking Tools
IPv4 CIDR Reference
Complete IPv4 CIDR notation reference table with subnet masks and host counts.
IPv6 CIDR Reference
Complete IPv6 CIDR notation reference with address ranges and subnet calculations.
Root Zone Database
Browse all top-level domains (TLDs) — gTLDs, ccTLDs and their registry operators.
ASN Assignments
Autonomous System Number (ASN) allocations from IANA by Regional Internet Registry.