The last World Radio TV Handbook I have, which is mid 80's I think, mentions India having DC mains. In this day and age I find that impossible to believe, but I would be fascinated to know what sort of things are being run off it, if it really does still exist. It would be more believable if it was an industrial supply only and not for residential consumers.
Sydney had DC mains up until 1988 or thereabouts; 480V centretapped. BUT it was only in part of the CBD and by 1988 was only being used for lift motors. The general consumer mains in this area had been connected to AC in the 1950's.
Those charts showing world voltages and TV standards often have mistakes; I can recall Fiji having 220V 60 cycles and NTSC televsion in one of them. Nothing could be further from the truth; it's 240V 50c/s & PAL..I know I've been there...even the electrical fittings are Australian. Some travel websites are incredibly innacurate for this sort of information.