Your Nintendo Switch with a serial number starting with XKJ1 is definitely patched.
Conclusion:
A Switch with serial XKJ1 is almost certainly patched against the Fusée Gelée hardware exploit (RCM hack). Unpatched units are generally found in serials up to XKJ7000xxxxxx (early 2018). XKJ1xxxxxxx indicates a significantly later build. is my switch patched xkj1 top
Damota SSNC Checker – Another serial number checker used by the r/SwitchPirates community. Your Nintendo Switch with a serial number starting
If you’ve landed here, you’re likely holding a Nintendo Switch, staring at the back of the console, and squinting at a serial number that starts with XKJ1. You’ve probably heard whispers in online forums or YouTube videos about “unpatched” Switches being valuable for homebrew, custom firmware, or emulation. Your specific question is: “Is my Switch patched if the serial number is XKJ1 and I see the word ‘TOP’ on the label?” Early HAC-001 serials (pre-Mariko) → likely vulnerable
console (often identified by its red box and improved battery life). Hackability: