This is the command ldns-zsplit that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
ldns-zsplit - split up a zone file
ldns-zsplit [ OPTIONS ] zonefile
Split after NUMBER RRs, ldns-zsplit will not split in the middle of an RRs.
Each part is saved with a numerical suffix, starting with .000. The largest suffix is thus
use ORIGIN as origin when reading the zonefile.
-z Sort the zone before splitting.
-v Show version number and exit.
Use ldns-zsplit online using onworks.net services