Every Original Prusa printer has a unique serial number assigned to it. This is found on a silver sticker on every machine and is also hardcoded to the main controller board. Serial numbers issued before November 2021 start with "CZPX", while after November 2021 we introduced a new format starting with "SN". All serials are registered in our internal database and they allow us to confirm your printer as genuine.

For some printer models, placing the serial sticker on the frame is part of the assembly process!

The best way to reference your printer is the order number you received when purchasing the printer. This can be found on the invoice or in your order-history in the eshop.

Prusa CORE One

A label is found on the back of the printer, between the PSU and the xBuddy board.

If you assembled the CORE ONE printer from the kit, the Serial Number label is already placed on the top right of the rear assembly.

Original Prusa MK-series

A label can be found on the back of the frame above the PSU, or on the rear plate of the printer.


Original Prusa MK-series until 2022	Original Prusa MK-series from 2023

Original Prusa MINI & MINI+

A label is found on the Z-axis extrusion (circled in red), on the right side.

Original Prusa XL

The Original Prusa XL may have one or two silver stickers. Check the whole rear of the printer to locate one or two stickers.

If the printer has two serial number stickers, the XL printer serial number is the one on the top sticker.

If the printer has one serial number sticker, the XL printer serial number is located on the bottom rear of the printer.

In both cases, the sticker has the text Original Prusa XL stamped on it.


XL with two serial number stickers	XL with one serial number sticker

Original Prusa SL1 & SL1S

A label is found on the back (circled in red), in the bottom left.

Original Prusa Enclosure

The label can be found on the side of the PSU holder.

Hardcoded serial number

This requires a special application and commands, dependent on the printer, to extract. Nothing proprietary, but the procedure is rather advanced. If you really need to get the serial number this way, please email Customer support.

Prusa CORE One L

General Information

Original Prusa Serial Number

Assembly manuals