Monitor model identification from the serial number

Every Dell monitor has label with the 20 digit serial number. That same label could also show a Service Tag. Enter that Service Tag here.

CN-06NK9J-74445-21C-319U
In the above monitor 20 digit serial number, 6NK9J is the Dell 5 digit part number.

You would then do a simple Google search for the Dell 5 digit part number = dell part 6NK9J