Not 'in-house' numbering but the usual non-informative SMD part numbering. There are SMD 'catalogs' available on line that can, in many instances, decode these numbers/letters to actual parts....
Manufacturers print anything on their parts so they can identify their production batches in-house. Next day, same part production may have a completely different markings.
The correct part number appears only at the reel or bulk packaging labels.
I will also go with Kellys_eye and Robert fay's recommendations, but be warned, finding SMD numbers can be difficult
Robert has given you a great start, so once you have a possible normal part # corresponding to the SMD number
then you can google a datasheet for that normal part number and see if the devices matches looks etc
OFTEN, the datasheets will have the SMD part markings listed