why does my Ipv6 store mysql data get shortened?

why does my Ipv6 store mysql data get shortened?

I have mysql column store ip
I set data type varbinary 16
when I save ipv6 into it, why is it truncated?
2001:11ff:ffff:ffff:ffff:ffff:ffff:ffff become 2001:11ff:ffff:f