flat/sub.example.net/keyset-sub.example.net.

$ORIGIN .
sub.example.net     7200    IN DNSKEY 257 3 7 (
                    AwEAAcVJgMf71y0M2KfrhiAKIHkhS8MlgmKb
                    jkaBY56zZRAQMwHJyMODZcIgBQvPkxGw/1Yr
                    /5v3ZbOwVCj7zeYfve+tRsXXBEYTvo7POLE9
                    H0iMf69vq7Qxh82/q+LpBH1818iDhBn6q0f7
                    ww4Flo7B3u5zJf6FHul8JPx5UPSENnx3
                    ) ; key id = 48516