When you see flushed PNR, it could mean that the number you entered is "wrong". It could also mean that the you are referring to a very very old ticket. Since we have a limited number number of digits, viz., 10, there could be a total number of 10 to the power of 10 (ie., 10 billion) numbers. Owing to the fact that there are millions of railway travellers a month, this 10 digit numbers will run out easily, especially in countries in India and US where the population is high. This will enforce the government of India to flush the PNR numbers when the same is no longer required. Don't worry, your PNR number will not be re-issued to another railway passenger for a reasonably long time, so your privacy is guaranteed by Indian Railways.
please wait...Translate to HindiJab tu flushed PNR dekhega, toh iska matlab hosakta hai ki tune "galat" number daala hai. Yeh bhi ho sakta hai ki tu bahut purane ticket ki baat kar raha hai. Hamaare paas sirf 10 digit ki sankhya hai, matlab 10 karod tak ke numbers ho sakte hai. Kyunki harek maheene lakho log railway se yatra karte hai, toh yeh 10 digit numbers aasani se khatam hojayenge, khas kar India aur US jaise desho mein jahaan population zyada hai. Isliye Bharatiya sarkar ko PNR numbers ko flush karna padega jab woh zaroorat se zyada na ho. Fikar na kar, tere PNR number ko koi aur train yatri ke liye reasonably long time tak phirse issue nahi kiya jayega, toh teri privacy ko Indian Railways guarantee karti hai.