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- Code : 63300
- Nom : Riom
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- Les Ancizes-Comps (63004)
- Artonne (63012)
- Aubiat (63013)
- Ayat-sur-Sioule (63025)
- Beauregard-Vendon (63035)
- Biollet (63041)
- Blot-l'Église (63043)
- Chambaron sur Morge (63244)
- Champs (63082)
- Chapdes-Beaufort (63085)
- Chappes (63089)
- Charbonnières-les-Vieilles (63093)
- Le Cheix-sur-Morge (63108)
- Châteauneuf-les-Bains (63100)
- Châtel-Guyon (63103)
- Clerlande (63112)
- Combronde (63116)
- Crevant-Laveine (63128)
- Davayat (63135)
- Ennezat (63148)
- Entraigues (63149)
- Espinasse (63152)
- Gimeaux (63167)
- Gouttières (63171)
- Joze (63180)
- Jozerand (63181)
- Lisseuil (63197)
- Loubeyrat (63198)
- Luzillat (63201)
- Manzat (63206)
- Marcillat (63208)
- Maringues (63210)
- Marsat (63212)
- Martres-sur-Morge (63215)
- Montcel (63235)
- Mozac (63245)
- Ménétrol (63224)
- Pessat-Villeneuve (63278)
- Prompsat (63288)
- Pulvérières (63290)
- Queuille (63294)
- Riom (63300)
- Saint-André-le-Coq (63317)
- Saint-Angel (63318)
- Saint-Bonnet-près-Riom (63327)
- Saint-Georges-de-Mons (63349)
- Saint-Gervais-d'Auvergne (63354)
- Saint-Hilaire-la-Croix (63358)
- Saint-Ignat (63362)
- Saint-Jacques-d'Ambur (63363)
- Saint-Julien-la-Geneste (63369)
- Saint-Laure (63372)
- Saint-Myon (63379)
- Saint-Pardoux (63382)
- Saint-Priest-des-Champs (63388)
- Sainte-Christine (63329)
- Sardon (63406)
- Sauret-Besserve (63408)
- Surat (63424)
- Teilhède (63427)
- Thuret (63432)
- Varennes-sur-Morge (63443)
- Vitrac (63464)
- Yssac-la-Tourette (63473)
