Delta Confirmation Number Decoder Ring
#16
FlyerTalk Evangelist


Join Date: Nov 2000
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Posts: 11,405
They mean NOTHING.
Why is that so hard to understand?
Why is that so hard to understand?
#18



Join Date: Sep 2016
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#20




Join Date: Jun 2013
Location: Roswell, GA
Programs: AA EXP 2.9MM.. Hilton Diamond, IHG ambassador, other hotel programmes got status
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#21




Join Date: May 2004
Location: Colorado
Programs: UA & IHG Plat, SWAlist, Frontier 100k, Marriott Titan, IHG-Hilton-Hyatt-Wynd Gold, Nat EE, Hertz PC
Posts: 447
You are incorrect about capital Is and Os.
For example, today confirmation has two Is and two Os in it. On Alaska, not all airlines adhere to the same rules.
Patrick
For example, today confirmation has two Is and two Os in it. On Alaska, not all airlines adhere to the same rules.
Patrick
Most airlines confirmation numbers (or record locator) are sequential, not random. Starting with a letter but including both numbers and letters. But do not include the letter I or O since they could be easily confused with 1 and zero. 10 digits and 24 letters allows for a very large number of unique 6-character confirmation numbers before they would need to be reused.
HXEL28
HXEL29
HXEL2A
HXEL2B
...
HXEL2H
HXEL2J
...
HXEM1B
HXEM1C
When airlines and GDS systems send messages to each other, they always identify the airline that owns the booking:
HDQAA A23456 The booking with confirmation number A23456 is owned by American Airlines and was stored by the AA headquarters location.
MUC1A A12345 The booking with confirmation number A12345 is owned by Amadeus and was stored by the Munich computer center.
HXEL28
HXEL29
HXEL2A
HXEL2B
...
HXEL2H
HXEL2J
...
HXEM1B
HXEM1C
When airlines and GDS systems send messages to each other, they always identify the airline that owns the booking:
HDQAA A23456 The booking with confirmation number A23456 is owned by American Airlines and was stored by the AA headquarters location.
MUC1A A12345 The booking with confirmation number A12345 is owned by Amadeus and was stored by the Munich computer center.
#22


Join Date: Oct 2017
Location: PIT/WAS
Programs: Delta GM
Posts: 259
I had to look up a reservation for my father recently and it included either the letter O or the numeral 0, I forget which. When I typed in the confirmation number and his name, I typed the incorrect character but it pulled up the reservation regardless. There was a little note at the top of the page saying something along the lines of "you typed XXXX0X but the reservation is actually XXXXOX."
#24
Join Date: Nov 2013
Posts: 54
So how do tools like CheckMyTrip or TripCase figure it out? If you try to enter your locator number, sometimes it finds your record and sometimes it says your airline or travel agency doesn't participate but you can enter your itinerary manually. So there must be some way it decodes them. Or maybe it just tries looking them up in all the different systems to see which one gets a result?
#25
FlyerTalk Evangelist




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Location: San Antonio
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Posts: 28,002
So how do tools like CheckMyTrip or TripCase figure it out? If you try to enter your locator number, sometimes it finds your record and sometimes it says your airline or travel agency doesn't participate but you can enter your itinerary manually. So there must be some way it decodes them. Or maybe it just tries looking them up in all the different systems to see which one gets a result?


