The PNR (Passenger Name Record), also known as a booking reference or confirmation code, is a unique 6-character alphanumeric string (e.g., AB12CD) used by airlines to access your reservation. On a digital or printed e-ticket itinerary, the PNR is usually located prominently near the top of the document, often labeled as "Booking Reference," "Confirmation Number," or "Record Locator." If you are looking at a mobile boarding pass in an app like Apple Wallet, the PNR is often found just below the barcode or in the "info" section of the pass. On Indian Railway (IRCTC) tickets, the PNR is typically a 10-digit numeric code found in the top-left corner of the ticket. For airlines, this code is essential for managing your booking online, checking in, or adding extra baggage. It is different from your ticket number (which is a longer, 13-digit numeric string starting with the airline's specific code). If you cannot find it, you can always retrieve it by logging into the airline's website with your last name and the credit card used for purchase, or by checking the "confirmation" email sent immediately after you booked your flight.