alt Hacker NewsThat's merely convention. I've encountered at least one VPS provider handing out /128's.
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craftkiller • today at 1:29 PM
It is more than convention, the /64 is the minimum allocation to support SLAAC. If you're getting less than a /64 you're not getting full support for IPv6.
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While a situation like that is really annoying, I bet it's still generally following the rule of one /64 per network. What you're not getting is control over your IPs on that network.