a4426521437ad42b6baedae66b7f2092-62529caf5ab986d6.elb.ap-southeast-1.amazonaws.com AXFR zone transfer

Not an apex domain The domain a4426521437ad42b6baedae66b7f2092-62529caf5ab986d6.elb.ap-southeast-1.amazonaws.com is not the root of its zone.
Instead, try zone transfer on elb.ap-southeast-1.amazonaws.com .