--- /dev/null
+redo-ifchange root-servers.net.zone
+perl -lane 'print $F[$#F] if $F[3] =~ /^AA?/' < root-servers.net.zone |
+while read addr ; do
+ [ "${addr#*:}" = "$addr" ] && echo $addr ||
+ sipcalc $addr | perl -lane 'print $F[$#F] if /^Compressed address/'
+done