Which of these are valid and which are invalid to assign to hosts? List the reason for each.

$2001$:$0$CC$9$::$0011$:FFAA::$13/64$

$2001$:$0$DB$1$:$8210$:ACB$1$:FAAE:$8888$:$1010$:ABCD:$8101/96$

$2009$:AB$99$:$1$:$13$::$20/88$

FE$80$:::$1/92$

FF$01$::ABCD$/64$

FE$80$::$80$:$80$:ABCD$/64$

::$1/128$