Not an apex domain
The domain 104-218-70-81.lnk01-oa01.lnk.ne.allofiber.net is not the root of its zone.
Instead, try zone transfer on lnk01-oa01.lnk.ne.allofiber.net .
Instead, try zone transfer on lnk01-oa01.lnk.ne.allofiber.net .