All PlayStation 3 software titles have a serial number containing a four-character prefix followed by a five-digit suffix. This code can be found on the side of the software case and varies according to the region in which the software title was purchased. Blu-ray discs may be locked so that they only function on PlayStation 3 systems purchased in the same region.
The usual prefixes for PlayStation 3 software titles are as follows:
Prefix Description
BCES First party title, Europe
BLES Third party title, Europe
BCUS First party title, USA
BLUS Third party title, USA
BCJS First party title, Japan
BLJS Third party title, Japan
BLJM Third party title, Japan
BCAS First party title, Asia
BLAS Third party title, Asia