On the physical device, the serial number is located on a of the unit, typically near the charging port and headphone jack.
Look for a white or silver sticker on the bottom edge of the device (near the charging port). check ps vita serial number
The most direct way to find the serial number is by looking at the physical sticker on the console. PS Vita 1000 (OLED Model) On the physical device, the serial number is
If you see Kanji characters on the sticker, you have a Japanese import console. The serial number is still numeric, but the model number will likely be PCH-1000 or PCH-2000 without a regional suffix. Japanese Vitas have the "O" button as accept and "X" as back, which can be swapped in settings. PS Vita 1000 (OLED Model) If you see
This is the easiest method if you have the console in hand.