There are no Tamil LCNs left. The LCNs should be changed. I have a plan here:
Tamil and Telugu should have 100 LCNs each (they can start at 100 and 200). Malayalam and Kannada can have 50 LCNs each (can start at 300 and 350). Hindi, English and non-South channels can occupy the LCNs from 400 to 799.
For HD channels, South channels should be confined within 800 to 849. Hindi channels should be from 850 to 879 and Marathi and Bangla should be from 880 to 899. In the current scenario the South LCNs (until 869) are hugely spread apart, and the ROI HD channels are crammed between 870 and 899. English and multi-language HD channels (sports, knowledge, lifestyle) will begin from 900 as they do already.