IPV6 help needed

IS there any classes in IPV6 address as we have a classes in ipv4 address like 0.0.0.0-126.255.255.255 class A
128.0.0.0-191.255.255.255 class B and so on.
If there is classes please let me know the ranges. Thanks in advance.
Answer #1
No, In IPv6 we have, prefix, that is something like subnet mask, and second part, that is MAC address of NIC