BU;Burgas
BL;Blagoevgrad
VN;Varna
VT;Veliko Tarnovo
VD;Vidin
VR;Vratsa
GA;Gabrovo
DO;Dobrich
KA;Kardzhali
KD;Kyustendil
LV;Lovech
MN;Montana
PA;Pazardzhik
PK;Pernik
PL;Pleven
PD;Plovdiv
RZ;Razgrad
RS;Ruse
SS;Silistra
SL;Sliven
SM;Smolyan
SF;Sofia (City)
SO;Sofia (District)
SZ;Stara Zagora
TA;Targovishte
HA;Haskovo
SN;Shumen
YA;Yambol