Internet Protocol Datacasting, which implies Internet Protocol based datacasting (data broadcasting) over radio and television broadcasting networks such as DVB-H
Digital Forty Four, a 2004 trial datacasting service licensed by the Australian Broadcasting Authority
In analog television systems the vertical blanking interval can be used for datacasting (to carry digital data), since nothing sent during the VBI is displayed on the screen; various test signals, time codes, closed captioning, teletext, CGMS-A copy-protection indicators, and various data encoded by the XDS protocol (e.g., the content ratings for V-chip use) and other digital data can be sent during this time period.
In practice, the LCN 4 prefix has for most of its life been largely unused, except in Sydney (where it was used by the Digital Forty Four trial datacasting service from 2004 to 2010).