Anyone with an IPv4 address can use one of several 6to4 gateways to get a whole ... | Hacker News

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		colmmacc on June 7, 2014 \| parent \| context \| favorite \| on: Introducing Pseudo IPv4 Anyone with an IPv4 address can use one of several 6to4 gateways to get a whole /48. This gives them access to 2^80 addresses they can originate traffic from.

sp332 on June 7, 2014 [–]

As mentioned in the article, they only hash the first 64 bits of the address. That means you only get 64-48 = 16 bits to work with.

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