Applies to: All Scarlett generations
The serial number of your Scarlett will be found on the underside, either on a sticker or etched on the casing. The prefix of your serial number will denote which generation Scarlett you own:
| Generation | Serial Number Prefix | Notes |
| Scarlett 4th Gen | S1, S2, S4, T1, T2 | Every mode has a different prefix. Units beginning with T are Studio Pack units. |
| Scarlett 3rd Gen |
Y7, Y8, D8, F8, F9, P9, P7, P5 |
Every model has a different prefix. |
| Scarlett 2nd Gen | V, W | |
| Scarlett 1st Gen (Including 8i6 & 18i6) | U, S, T | The 'pre-first-gen' 8i6 and 18i6 prefix is 'U' |
Which generation you have determines which software and drivers appear in your user account, as well as which Downloads page you select on the Focusrite website.