the table below shows all Samsung firmware country/region letter codes gathered from the internet

Code	Country
AW	Hungary
AZ	France
BD	Cyprus, Greece
BY	Greece
CB	Poland
CE	Benelux
CP	Denmark, Finland, Norway, Sweden
DB	Vietnam
DC	Thailand
DD	India
DT	Australia
DX	Indonesia, Malaysia, Philippines, Singapore, Vietnam
DZ	Malaysia, Singapore
JA	South Africa
JC	Algeria, Morocco, Nigeria, South Africa, Tunisia
JP/JR	Arabic
JV/JX	Algeria, Egypt, Iran, Iraq, Kuwait, Morocco, Nigeria, Oman, Pakistan, Saudi Arabia, South Africa, Syria, Tunisia, Turkey
JW	West Africa
KA	Turkey
ME	France
MK	Serbia
MS	France, Germany, Italy, Netherlands, Portugal, Spain, Turkey, UK
MT	Switserland
MY	Italy
NH	Latvia
PO	France
PU	Russia
UB	Brazil
XA	Austria, France, Germany, Italy, Netherlands, Switzerland, United Kingdom
XB	Denmark, Norway, Sweden
XC	Portugal, Spain
XD	Croatia, Czech, Hungary, Slovakia
XE	Bulgaria, Estonia, Kazakhstan, Latvia, Lithuania, Russia, Ukraine
XF	Bulgaria, Croatia, Romania
XP	UK, France, Italy, Spain, Netherlands, Poland, Portuguese, Turkey
XW	Austria, Belgium, France, Germany, Hungary, Italy, Spain, United Kingdom
XX	Austria, Belgium, France, Germany, Hungary, Italy, Nordic, Spain, United Kingdom
ZC/ZS	China, Hong Kong
ZH	Hong Kong
ZT	Taiwan