| Code | Name | Region |
|---|---|---|
| FRIIV | Castelviel | 33 |
| FRB9Z | Castera-bouzet | 82 |
| FRGVG | Castera-verduzan | 32 |
| FRXZU | Casseneuil | 47 |
| FRCA8 | Casseuil | 33 |
| FRAIS | Cassis | 13 |
| FRUJO | Cassuejouls | 12 |
| FR9TI | Castagniers | 6 |
| FR8CA | Castandet | 40 |
| FRNNW | Castanet | 81 |
| FRTLO | Castanet-tolosan | 31 |
| FRCCI | Castelculier | 47 |
| FRRC7 | Castelferrus | 82 |
| FRTEL | Castelfranc | 46 |
| FRQCG | Castelginest | 31 |
| FRCJX | Casteljaloux | 47 |
| FRTEA | Castella | 47 |
| FRCTK | Castellane | 4 |
| FRCS9 | Castelmaurou | 31 |
| FRZCA | Castelmoron-sur-lot | 47 |
| FRTDG | Castelnau-d'angles | 32 |
| FRCTY | Castelnaudary | 11 |
| FRUD2 | Castelnau-d'aude | 11 |
| FRCOS | Carros | 6 |
| FRCRG | Carrouges | 61 |
| FRRYR | Carry-le-rouet | 13 |
| FRCYW | Cars | 33 |
| FRCAC | Carsac-aillac | 24 |
| FR4CG | Carsac-de-gurson | 24 |
| FRCPH | Carspach | 68 |
| FRAR7 | Cartelegue | 33 |
| FRCRT | Carteret | 50 |
| FRG7C | Cartignies | 59 |
| FRATG | Cartigny | 80 |
| FRAIN | Carvin | 62 |
| FRVVW | Casalabriva | 2A |
| FRXDR | Cascastel-des-corbieres | 11 |
| FRCV5 | Caseneuve | 84 |
| FRCPN | Cases-de-pene | 66 |
| FRWCS | Cassagnes | 66 |
| FRG32 | Cassaigne | 32 |
| FRWQW | Cassel | 59 |
| FRXCA | Cassen | 40 |
| FRNAC | Carnac | 56 |
| FRNC2 | Carnac-rouffiac | 46 |
| FRVCS | Carnas | 30 |
| FRCI3 | Carneville | 50 |
| FRRNR | Carnieres | 59 |
| FRCTW | Carnoet | 22 |
| FRNPG | Carnon-plage | 34 |