Old 3DS/Old 3DS XL/2DS/New 3DS/New 3DS XL:
-----------------------------


(Should be 11.6 to 11.3, but i am not 100% sure) 11.4 - 11.3:
USA: 0004003000008F02 v27648
EUR: 0004003000009802 v26624
JPN: 0004003000008202 v29696

11.2 - 11.1:
USA: 0004003000008F02 v26624
EUR: 0004003000009802 v25600
JPN: 0004003000008202 v28672

11.0 - 10.6:
USA: 0004003000008F02 v25600
EUR: 0004003000009802 v24576
JPN: 0004003000008202 v27648

10.5 - 10.4:
USA: 0004003000008F02 v24578
EUR: 0004003000009802 v23554
JPN: 0004003000008202 v26626

10.3:
USA: 0004003000008F02 v23552
EUR: 0004003000009802 v22528
JPN: 0004003000008202 v25600

10.2:
USA: 0004003000008F02 v22528
EUR: 0004003000009802 v21504
JPN: 0004003000008202 v24576

10.1:
USA: 0004003000008F02 v21504
EUR: 0004003000009802 v20480
JPN: 0004003000008202 v23552

10.0 - 9.9:
USA: 0004003000008F02 v20480

10.0 - 9.8:
EUR: 0004003000009802 v19456
JPN: 0004003000008202 v22528

9.8:
USA: 0004003000008F02 v19456

9.7:
USA: 0004003000008F02 v18432
EUR: 0004003000009802 v17415
JPN: 0004003000008202 v20487

9.6:
USA: 0004003000008F02 v16404
EUR: 0004003000009802 v16404
JPN: 0004003000008202 v19476

9.5.0-23 - 9.5.0-22:
USA: 0004003000008F02 v15360
EUR: 0004003000009802 v15360
JPN: 0004003000008202 v18432

9.4:
EUR: 0004003000009802 v14336
JPN: 0004003000008202 v17408

9.4 - 9.2:
USA: 0004003000008F02 v13330

9.3:
JPN: 0004003000008202 v16402

9.3 - 9.2:
EUR: 0004003000009802 v13330

9.2:
JPN: 0004003000008202 v15360

I can't be arsed to copy stuff more than that. If your firmware is lower than this go to https://yls8.mtheall.com/ninupdates/reports.php
and find it yourself.