Official numbers assigned to each department
(same numbers are also used in the map below)
| 01 Ain | 25 Doubs | 49 Maine-et-Loire | 73 Savoie |
| 02 Aisne | 26 Drôme | 50 Manche | 74 Haute-Savoie |
| 03 Allier | 27 Eure | 51 Marne | 75 Paris |
| 04Alpes-de-Haute-Provence | 28 Eure-et-Loir | 52 Haute-Marne | 76 Seine-Maritime |
| 05 Hautes-Alpes | 29 Finistère | 53 Mayenne | 77 Seine-et-Marne |
| 06 Alpes-Maritime | 30 Gard | 54 Meurthe-et-Moselle | 78 Yvelines |
| 07 Ardèche | 31 Haute-Garonne | 55 Meuse | 79 Deux-Sèvres |
| 08 Ardennes | 32 Gers | 56 Morbihan | 80 Somme |
| 09 Ariège | 33 Gironde | 57 Moselle | 81 Tarn |
| 10 Aube | 34 Hérault | 58 Nièvre | 82 Tarn-et-Garonne |
| 11 Aude | 35 Ille-et-Vilaine | 59 Nord | 83 Var |
| 12 Aveyron | 36 Indre | 60 Oise | 84 Vaucluse |
| 13 Bouches-du-Rhône | 37 Indre-et-Loire | 61 Orne | 85 Vendée |
| 14 Calvados | 38 Isère | 62 Pas-de-Calais | 86 Vienne |
| 15 Cantal | 39 Jura | 63 Puy-de-Dome | 87 Haute-Vienne |
| 16 Charente | 40 Landes | 64 Pyrénées-Atlantic | 88 Vosges |
| 17 Charente-Maritime | 41 Loir-et-Cher | 65 Hautes-Pyrénées | 89 Yonne |
| 18 Cher | 42 Loire | 66 Pyrénées-Orientales | 90 Belfort |
| 19 Corrèze | 43 Haute-Loire | 67 Bas-Rhin | 91 Essone |
| 20 Corse (see note) | 44 Loire-Atlantic | 68 Haut-Rhin | 92 Hauts-de-Seine |
| 21 Côte-D'Or | 45 Loiret | 69 Rhône | 93 Seine-Saint-Denis |
| 22 Côtes-du-Nord | 46 Lot | 70 Haute-Saône | 94 Val-de-Marne |
| 23 Creuse | 47 Lot-et-Garonne | 71 Saône-et-Loire | 95 Val-D'Oise |
| 24 Dordogne | 48 Lozère | 72 Sarthe |