How to know an A/C short name?

[Alberto]

For the sake of me, I cannot see this piece of information anywhere. Given a specific aircraft model, where do I find what will be its short name?
For example, the Airbus A320 will be short-named "A320" in the route timetables page; the Airbus A321neo will be "A21N", etc.
For an arbitrary aircraft model, how do I find what this name will be? E.g. the Airbus A321neoLR: will it have its own different short name, or will it be "A21N"? Etc.
How to I get this information in general?!

Specifically, if I see a competitor has a bunch of A321neoLR or XLR, I want to go to their route timetables page and see on which routes they are using them (Ctrl+F on the browser searching the aircraft short name... but what is this short name I shall be looking for?!).

[groundbum2]

most alliances have an aircraft database that could help you, so you could join an alliance.

The only other way is to do as you do, look at airline with type X, look at that airlines timetables, then backtrack. So for an XLR look for A321s on long range routes. Many types collapse down to one short code though, so you won't always be sure what exact type is on the route. For example B741 covers many variants of the B747-100x/SP/etc.

Simon

[broadbander]

Aircraft type short codes under the "codes" section in the linked Wikipedia article. E.g. A19N = A319neo, B38M = 737Max 8.

[Alberto]

Aircraft type short codes under the "codes" section in the linked Wikipedia article. E.g. A19N = A319neo, B38M = 737Max 8.

This appears to work! Thanks!