IPv6地址空间
在IPv6地址空间中，当前所用到的主要有4段（分别是全球单播地址、本地唯一单播地址、链路范围单播地址及多播地址），其它各段为IETF保留。
用到的4个地址段
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2000::/3-- 从2000::到3fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff全球单播地址空间，Global Unicast Address Space
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fc00::/7-- 从fc00::到fdff:ffff:ffff:ffff:ffff:ffff:ffff:ffff本地唯一单播地址， Unique Local Unicast Address Space
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fe80::/10-- 从fe80::到febf:ffff:ffff:ffff:ffff:ffff:ffff:ffff链路上的单播地址空间， Link Scoped Unicast Address Space
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fec0::/10-- 从fec0::到feff:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF。 RFC38979中弃用，先前的站点本地范围地址前缀。
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ff00::/8-- 从ff00::到ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff多播地址空间, Multicast, 该段中由IANA分配的地址在这里进行了登记：IPv6 Multicast Addresses
全部IPv6地址空间
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::/8-- 从::到00ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF
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0100::/8-- 从0100::到01ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF
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0200::/7-- 从0200::到03ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF
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0400::/6-- 从0400::到07ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF
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0800::/5-- 从0800::到0fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF
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1000::/4-- 从1000::到1fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF
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2000::/3-- 从2000::到3fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff全球单播地址空间，Global Unicast Address Space
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4000::/3-- 从4000::到5fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF
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6000::/3-- 从6000::到7fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF
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8000::/3-- 从8000::到9fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF
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a000::/3-- 从a000::到bfff:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF
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c000::/3-- 从c000::到dfff:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF
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e000::/4-- 从e000::到efff:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF
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f000::/5-- 从f000::到f7ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF
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f800::/6-- 从f800::到fbff:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF
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fc00::/7-- 从fc00::到fdff:ffff:ffff:ffff:ffff:ffff:ffff:ffff本地唯一单播地址， Unique Local Unicast Address Space
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fe00::/9-- 从fe00::到fe7f:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF
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fe80::/10-- 从fe80::到febf:ffff:ffff:ffff:ffff:ffff:ffff:ffff链路上的单播地址空间， Link Scoped Unicast Address Space
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fec0::/10-- 从fec0::到feff:ffff:ffff:ffff:ffff:ffff:ffff:ffff为IETF所保留, Reserved by IETF。 RFC38979中弃用，先前的站点本地范围地址前缀。
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ff00::/8-- 从ff00::到ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff多播地址空间, Multicast