If you prefer train as a medium of traveling in India then sooner or later you have to deal with waiting list ticket. In that case, prior to the traveling you need to know whether your ticket is confirmed or not using the assigned PNR no. You can do it through SMS or phone call or online. It’s going to prove beneficial in case you lost your ticket, only if you know your PNR no. So, whenever purchase a ticket write it down anywhere you want and keep it safe.
When traveling by train in India, you may find that your train ticket is on a waitlist. This is quite common and to find out whether your ticket is confirmed you need to check your current check PNR status. You can easily do this online at http://spotyourtrain.info/pnr-status. To see the current status of your train ticket on the IRCTC booking system waitlist, just use the form at the top of this page.
you need to check pnr status because when you book tickets which is on waiting list and RAC you need to get it confirmed before you can travel and that is reason why every one needs pnr number to check pnr status and you can easily check it here also http://www.tatkalirctc.com/pnrstatus