These websites are known to have been using ns.didata.com.au as their DNS nameserver.
DDLShttp://pageoverview.com/website-report/ddls.com.au
Leading corporate IT education provider in Australia, DDLS offers computer training courses including IT training courses and certification programs for Microsoft, Cisco, Citrix, VMWare, Apple, Project Management, Business Analysis, Agile, ITIL, PRINCE2, Business Skills training, 1800 U LEARN, 1800 853 276