Find the for your specific serial prefix?

Before the modern Nintendo Account, we had the Nintendo Network ID (NNID). In some support scenarios, Nintendo support agents would use the serial number to locate a lost NNID or transfer digital game licenses to a new SD card.

: Users with GodMode9 can find the serial number by navigating to "System Info" within the tool. www.reddit.com to another console or a forgotten PIN? Where Can I Find My System Serial Number?