| Country | Vecchio pfx | Nuovo pfx |
| Armenia | UG , RG | EK |
| Azerbaijan | UD , RD | 4J – 4K |
| Belarus | UC , RC | EU – EW |
| Georgia | UF , RF | 4L |
| Kazakhistan | UL , RL | UN – UQ |
| Kirghizstan | UM , RM | EX |
| Moldova | UO | ER |
| Russia | UK1,2,3,4,6,9,0UA1,2,3,4,6,9,0
RA1,2,3,4,6,9,0 UZ1,2,3,4,6,9,0 UV1,2,3,4,6,9,0 UW1,2,3,4,6,9,0 UN1 4K0,1,2,3,4 |
RA – RZUA – UI |
| Tadjikistan | UJ , RJ | EY |
| Turkmenistan | UH , RH | EZ |
| Ukraine | UB, RB, UT, RT, UY, RY | UR – UZ EM – EO |
| Uzbekistan | UI , RI | UJ – UM |