| 1:GY-BA:GY:BARIMA WAINI | |
| 2:GY-BAW:GY:BARIMA/WAINI | |
| 3:GY-CU:GY:CUYUNI/MAZARUNI | |
| 4:GY-DE:GY:DEMERARA/MAHAICA | |
| 5:GY-EB:GY:EAST BERBICE/CORENTYNE | |
| 6:GY-ES:GY:ESSEQUIBO I./WEST D. | |
| 7:GY-MA:GY:MAHAICA/BERBICE | |
| 8:GY-PM:GY:POMEROON/SUPENAAM | |
| 9:GY-PT:GY:POTARO/SIPARUNI | |
| 10:GY-UD:GY:UPPER DEMERARA/BERBICE | |
| 11:GY-UT:GY:UPPER TAKUTU/U.ESSEQUIBO |