What is the fastest, most accurate way to get daily volume information on the NYSE and NASDAQ daily ?

I track the daily volume on the NYSE and NASDAQ daily and need access to it as soon as possible after the close, where can i get this accurate information on this for free every day ? right now i have to wait till 7:00 CST for eIBD to publish online or get it off the nightly business report on PBS, both are inconvienent and other sources seem to vary in accuracy or track something other than i'm looking for, thanks for your help on this