[pilif]

You need a /48 (or /56) if you want to do your own subnetting and keep using SLAAC (which is the default way for assigning v6 addresses and detecting address conflicts).

A /64 is not enough for that. You can still create your own subnets, but you will be on your own with address assignment

[ArchOversight]

Name and shame the ISP that won't let you do a prefix delegation request to get a larger prefix assigned...

[winthrowe]

BellAliant in eastern Canada, the only provider of residential layer 1 fiber in my area, still isn't even assigning a /128 or /64, let alone proper delegation.

[ArchOversight]

That's an ISP that apparently still doesn't offer IPv6 at all... not an ISP that has a misconfigured IPv6 network.

[winthrowe]

Not offering IPv6 is intentional misconfiguration in this day and age, and deserves shame.