Postcode areas 28XXX
- Postcode area 28000 Chartres
- Postcode area 28100 Dreux
- Postcode area 28110 Lucé
- Postcode area 28120 Illiers-Combray
- Postcode area 28130 Maintenon
- Postcode area 28140 Orgères-en-Beauce
- Postcode area 28150 Voves
- Postcode area 28160 Brou
- Postcode area 28170 Châteauneuf-en-Thymerais
- Postcode area 28190 Courville-sur-Eure
- Postcode area 28200 Châteaudun
- Postcode area 28210 Nogent-le-Roi
- Postcode area 28220 Cloyes-sur-le-Loir
- Postcode area 28230 Épernon
- Postcode area 28240 La Loupe
- Postcode area 28250 Senonches
- Postcode area 28260 Anet
- Postcode area 28270 Brezolles
- Postcode area 28290 Arrou
- Postcode area 28300 Mainvilliers
- Postcode area 28310 Janville
- Postcode area 28320 Gallardon
- Postcode area 28330 Authon-du-Perche
- Postcode area 28340 La Ferté-Vidame
- Postcode area 28350 Saint-Lubin-des-Joncherets
- Postcode area 28360 Dammarie
- Postcode area 28380 Saint-Rémy-sur-Avre
- Postcode area 28400 Nogent-le-Rotrou
- Postcode area 28410 Bû
- Postcode area 28480 Thiron-Gardais
- Postcode area 28500 Vernouillet
- Postcode area 28600 Luisant
- Postcode area 28630 Le Coudray
- Postcode area 28700 Auneau
- Postcode area 28800 Bonneval