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<?xml version='1.0' encoding='UTF-8'?>
<?xml-stylesheet type="text/xsl" href="ipv6-address-space.xsl"?>
<?oxygen RNGSchema="ipv6-address-space.rng" type="xml"?>
<registry xmlns="http://www.iana.org/assignments" id="ipv6-address-space">
<title>Internet Protocol Version 6 Address Space</title>
<updated>2019-09-13</updated>
<note>The IPv6 address management function was formally delegated to
IANA in December 1995 <xref type="rfc" data="rfc1881"/>. The registration procedure
was confirmed with the IETF Chair in March 2010.
As stated in RFC3513, IANA should limit its allocation of IPv6-unicast
address space to the range of addresses that start with binary value 001.
The rest of the global unicast address space (approximately 85% of the IPv6
address space) is reserved for future definition and use, and is not to be
assigned by IANA at this time.
While <xref type="rfc" data="rfc3513"/> was obsoleted by <xref type="rfc" data="rfc4291"/>,
the guidiance provided to IANA did not change regarding the allocation of IPv6
unicast addresses.
</note>
<registry id="ipv6-address-space-1">
<registration_rule>IESG Approval</registration_rule>
<record>
<prefix>0000::/8</prefix>
<description>Reserved by IETF</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes>
<xref type="note" data="1"/>
<xref type="note" data="2"/>
<xref type="note" data="3"/>
<xref type="note" data="4"/>
<xref type="note" data="5"/>
<xref type="note" data="6"/>
</notes>
</record>
<record>
<prefix>0100::/8</prefix>
<description>Reserved by IETF</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes>0100::/64 reserved for Discard-Only Address Block <xref type="rfc" data="rfc6666"/>.
Complete registration details are found in <xref type="registry" data="iana-ipv6-special-registry"/>.</notes>
</record>
<record>
<prefix>0200::/7</prefix>
<description>Reserved by IETF</description>
<xref type="rfc" data="rfc4048"/>
<notes>Deprecated as of December 2004 <xref type="rfc" data="rfc4048"/>.
Formerly an OSI NSAP-mapped prefix set <xref type="rfc" data="rfc4548"/>.</notes>
</record>
<record>
<prefix>0400::/6</prefix>
<description>Reserved by IETF</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes/>
</record>
<record>
<prefix>0800::/5</prefix>
<description>Reserved by IETF</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes/>
</record>
<record>
<prefix>1000::/4</prefix>
<description>Reserved by IETF</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes/>
</record>
<record>
<prefix>2000::/3</prefix>
<description>Global Unicast</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes>The IPv6 Unicast space encompasses the entire IPv6 address range
with the exception of ff00::/8, per <xref type="rfc" data="rfc4291"/>. IANA unicast address
assignments are currently limited to the IPv6 unicast address
range of 2000::/3. IANA assignments from this block are registered
in <xref type="registry" data="ipv6-unicast-address-assignments"/>.
<xref type="note" data="7"/>
<xref type="note" data="8"/>
<xref type="note" data="9"/>
<xref type="note" data="10"/>
<xref type="note" data="11"/>
<xref type="note" data="12"/>
<xref type="note" data="13"/>
<xref type="note" data="14"/>
<xref type="note" data="15"/>
</notes>
</record>
<record>
<prefix>4000::/3</prefix>
<description>Reserved by IETF</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes/>
</record>
<record>
<prefix>6000::/3</prefix>
<description>Reserved by IETF</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes/>
</record>
<record>
<prefix>8000::/3</prefix>
<description>Reserved by IETF</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes/>
</record>
<record>
<prefix>a000::/3</prefix>
<description>Reserved by IETF</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes/>
</record>
<record>
<prefix>c000::/3</prefix>
<description>Reserved by IETF</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes/>
</record>
<record>
<prefix>e000::/4</prefix>
<description>Reserved by IETF</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes/>
</record>
<record>
<prefix>f000::/5</prefix>
<description>Reserved by IETF</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes/>
</record>
<record>
<prefix>f800::/6</prefix>
<description>Reserved by IETF</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes/>
</record>
<record>
<prefix>fc00::/7</prefix>
<description>Unique Local Unicast</description>
<xref type="rfc" data="rfc4193"/>
<notes>For complete registration details, see <xref type="registry" data="iana-ipv6-special-registry"/>.</notes>
</record>
<record>
<prefix>fe00::/9</prefix>
<description>Reserved by IETF</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes/>
</record>
<record>
<prefix>fe80::/10</prefix>
<description>Link-Scoped Unicast</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes>Reserved by protocol. For authoritative registration, see <xref type="registry" data="iana-ipv6-special-registry"/>.</notes>
</record>
<record>
<prefix>fec0::/10</prefix>
<description>Reserved by IETF</description>
<xref type="rfc" data="rfc3879"/>
<notes>Deprecated by <xref type="rfc" data="rfc3879"/> in September 2004. Formerly a Site-Local scoped address prefix.</notes>
</record>
<record>
<prefix>ff00::/8</prefix>
<description>Multicast</description>
<xref type="rfc" data="rfc3513"/><xref type="rfc" data="rfc4291"/>
<notes>IANA assignments from this block are registered in <xref type="registry" data="ipv6-multicast-addresses"/>.</notes>
</record>
<footnote anchor="1">::1/128 reserved for Loopback Address <xref type="rfc" data="rfc4291"/>.
Reserved by protocol. For authoritative registration, see <xref type="registry" data="iana-ipv6-special-registry"/>.</footnote>
<footnote anchor="2">::/128 reserved for Unspecified Address <xref type="rfc" data="rfc4291"/>.
Reserved by protocol. For authoritative registration, see <xref type="registry" data="iana-ipv6-special-registry"/>.</footnote>
<footnote anchor="3">::ffff:0:0/96 reserved for IPv4-mapped Address <xref type="rfc" data="rfc4291"/>.
Reserved by protocol. For authoritative registration, see <xref type="registry" data="iana-ipv6-special-registry"/>.</footnote>
<footnote anchor="4">0::/96 deprecated by <xref type="rfc" data="rfc4291"/>. Formerly defined as the "IPv4-compatible IPv6 address" prefix.</footnote>
<footnote anchor="5">The "Well Known Prefix" 64:ff9b::/96 is used in an algorithmic mapping between IPv4 to IPv6 addresses <xref type="rfc" data="rfc6052"/>.</footnote>
<footnote anchor="6">64:ff9b:1::/48 reserved for Local-Use IPv4/IPv6 Translation <xref type="rfc" data="rfc8215"/>.</footnote>
<footnote anchor="7">2001:0::/23 reserved for IETF Protocol Assignments <xref type="rfc" data="rfc2928"/>.
For complete registration details, see <xref type="registry" data="iana-ipv6-special-registry"/>.</footnote>
<footnote anchor="8">2001:0::/32 reserved for TEREDO <xref type="rfc" data="rfc4380"/>.
For complete registration details, see <xref type="registry" data="iana-ipv6-special-registry"/>.</footnote>
<footnote anchor="9">2001:2::/48 reserved for Benchmarking <xref type="rfc" data="rfc5180"/><xref type="rfc-errata" data="1752"/>.
For complete registration details, see <xref type="registry" data="iana-ipv6-special-registry"/>.</footnote>
<footnote anchor="10">2001:3::/32 reserved for AMT <xref type="rfc" data="rfc7450"/>.
For complete registration details, see <xref type="registry" data="iana-ipv6-special-registry"/>.</footnote>
<footnote anchor="11">2001:4:112::/48 reserved for AS112-v6 <xref type="rfc" data="rfc7535"/>.
For complete registration details, see <xref type="registry" data="iana-ipv6-special-registry"/>.</footnote>
<footnote anchor="12">2001:10::/28 deprecated (formerly ORCHID) <xref type="rfc" data="rfc4843"/>.
For complete registration details, see <xref type="registry" data="iana-ipv6-special-registry"/>.</footnote>
<footnote anchor="13">2001:20::/28 reserved for ORCHIDv2 <xref type="rfc" data="rfc7343"/>.
For complete registration details, see <xref type="registry" data="iana-ipv6-special-registry"/>.</footnote>
<footnote anchor="14">2001:db8::/32 reserved for Documentation <xref type="rfc" data="rfc3849"/>.
For complete registration details, see <xref type="registry" data="iana-ipv6-special-registry"/>.</footnote>
<footnote anchor="15">2002::/16 reserved for 6to4 <xref type="rfc" data="rfc3056"/>.
For complete registration details, see <xref type="registry" data="iana-ipv6-special-registry"/>.</footnote>
<people/>
</registry>
</registry>