| Dexter Orion charter Township | Eastern Time | -01:00 |
| Dexter Orleans | Eastern Time | -01:00 |
| Dexter Orland | Pacific Time | 02:00 |
| Dexter Ormond | Eastern Australia Time | -15:00 |
| Dexter Novi di Modena | Central European Time | -07:00 |
| Dexter Novi Grad | Central European Time | -07:00 |
| Dexter Nové Město na Moravě | Central European Time | -07:00 |
| Dexter Novo Gama | Brasilia Time | -02:00 |
| Dexter Oromocto | Atlantic Time | -02:00 |
| Dexter Orono | Central Time | 00:00 |
| Dexter Osborne Park | Western Australia Time | -13:00 |
| Dexter Osceola | Central Time | 00:00 |
| Dexter Orthez | Central European Time | -07:00 |
| Dexter Orvieto Scalo | Central European Time | -07:00 |
| Dexter Orxeta | Central European Time | -07:00 |
| Dexter Osio Sotto | Central European Time | -07:00 |
| Dexter Ostellato | Central European Time | -07:00 |
| Dexter Ostermundigen | Central European Time | -07:00 |
| Dexter Osterwasser | Central European Time | -07:00 |
| Dexter Ossipee | Eastern Time | -01:00 |
| Dexter Ospedaletto | Central European Time | -07:00 |
| Dexter Osprey | Eastern Time | -01:00 |
| Dexter Nova Gorica | Central European Time | -07:00 |
| Dexter Notting Hill | Eastern Australia Time | -15:00 |
| Dexter Nottingham | Eastern Time | -01:00 |
| Dexter Nantucket | Eastern Time | -01:00 |
| Dexter Nantwich | United Kingdom Time | -06:00 |
| Dexter Naniwa Ward | Japan Time | -14:00 |
| Dexter Nanjo | Japan Time | -14:00 |
| Dexter Montana | Central European Time | -07:00 |
| Dexter Montanara | Central European Time | -07:00 |
| Dexter Montblanc | Central European Time | -07:00 |
| Dexter Montauk | Eastern Time | -01:00 |
| Dexter Nala Sopara | India Standard Time | -10:30 |
| Dexter Náměšť nad Oslavou | Central European Time | -07:00 |
| Dexter Namur | Central European Time | -07:00 |
| Dexter Nanded-Waghala | India Standard Time | -10:30 |
| Dexter Nandikkara | India Standard Time | -10:30 |