PNR stands for "Passenger Name Record". The PNR Status informs you about the status of your booked railway ticket (Confirmed, Waiting List, RAC etc). PNR Number is a 10 digit number printed on your railway ticket or sent to you by IRCTC via SMS after booking ticket online. Using this 10 digit PNR number you can check your ticket's current booking status.
How to Check PNR Status Through SMS: You can check your PNR status on your phone by sending SMS on 139 using following format.
PNR Status: PNR <10 Digit PNR Number>
How to Check PNR Status Through Call : You can also enquire about your ticket's PNR status by calling on railways universal inquiry number 139 and following the IVR instructions for desired information.
How to Check PNR Status Online: Passengers can also check the PNR status online on the official website of the Indian railways: http://www.indianrail.gov.in/enquiry/PnrEnquiry.html. To check your booking status here you need to write your PNR number in the search box and click on submit button.