Last week, I saw someone on Twitter asking what the aircraft designator code for the Boeing 787-10 is.

Coincidentally, I came across ICAO DOC8643 regarding Aircraft Type Designators, which perfectly solved this problem.

So, I went to the ICAO website DOC 8643 - Aircraft Type Designators to check.

The answer is: the designator for the Boeing 787-10 is **B78X**.

Similarly:

• 737 MAX 7 is B37M
• 737 MAX 8 is B38M
• 737 MAX 9 is B39M
• 747-400LCF Dreamlifter is BLCF
• 747SCA Shuttle Carrier is BSCA
• 747SP is B74S
• 747SR is B74R
• 747-8 is B748
• 777-200LR and 777-F are B77L
• 777-300 is B773
• 777-300ER is B77W
• A-300ST Beluga and A-300ST Super Transporter are A3ST
• A-320neo is A20N
• A-319neo is A19N
• A-321neo is A21N
• A-330-900 is A339
• A-330-800 is A338
• A-350-900 XWB is A359
• A-350-1000 XWB is A35K
• A-380-800 is A388, and so on.

Additionally, the designator for the Cessna 172 is C172, but for the 172RG Cutlass RG it is C72R. The PA-28 Piper Cherokee has a large number of variants, and they are quite peculiar.