Aurora cluster DNS endpoint not found: 3(NXDOMAIN)

I've started to migrate my RDS Mysql (~40Gb) to Aurora about 5 hours ago it's still migrating there's no feedback on progress (in the same Migrating state since start) the cluster endpoints while shown as Available, they were for a few minutes(couldn't log in though), but now not even the endpoint DNS will resolve: $ host ***.rds.amazonaws.com ******.rds.amazonaws.com not found: 3(NXDOMAIN) Anyone seen this before?