| Portsmouth Agde | Central European Time | -01:00 |
| Portsmouth Osterwasser | Central European Time | -01:00 |
| Portsmouth San Diego | Venezuela Time | 05:00 |
| Portsmouth East Aurora | Eastern Time | 05:00 |
| Portsmouth Berthoud | Mountain Time | 07:00 |
| Portsmouth Dowarabazar | Bangladesh Time | -05:00 |
| Portsmouth Hämeenkyrö | Eastern European Time | -02:00 |
| Portsmouth Sohar | Gulf Standard Time | -03:00 |
| Portsmouth Aguas Calientes | Peru Time | 06:00 |
| Portsmouth Patchway | United Kingdom Time | 00:00 |
| Portsmouth San Cristóbal de La Laguna | Western European Time | 00:00 |
| Portsmouth Earlston | United Kingdom Time | 00:00 |
| Portsmouth Besham City | Pakistan Time | -04:00 |
| Portsmouth Dabaspete | India Standard Time | -04:30 |
| Portsmouth Halton Hills | Eastern Time | 05:00 |
| Portsmouth Sokali | India Standard Time | -04:30 |
| Portsmouth Aguadilla Pueblo | Atlantic Time | 05:00 |
| Portsmouth Pataskala | Eastern Time | 05:00 |
| Portsmouth San Donnino | Central European Time | -01:00 |
| Portsmouth Earlton | Eastern Time | 05:00 |
| Portsmouth Bethel | Eastern Time | 05:00 |
| Portsmouth Cyberjaya | Malaysia Time | -07:00 |
| Portsmouth Hamburg | Central European Time | -01:00 |
| Portsmouth Sodus | Eastern Time | 05:00 |
| Portsmouth Agua Amarga | Central European Time | -01:00 |
| Portsmouth Pathiyavaram | India Standard Time | -04:30 |
| Portsmouth San Clemente | Central European Time | -01:00 |
| Portsmouth Easebourne | United Kingdom Time | 00:00 |
| Portsmouth Bethlehem of Galilee | Israel Time | -02:00 |
| Portsmouth Cygnet | Eastern Australia Time | -09:00 |
| Portsmouth Hounslow | United Kingdom Time | 00:00 |
| Portsmouth Sodus Point | Eastern Time | 05:00 |
| Portsmouth Altona North | Eastern Australia Time | -09:00 |
| Portsmouth Patho | Eastern Australia Time | -09:00 |
| Portsmouth Rapperswil-Jona | Central European Time | -01:00 |
| Portsmouth Earley | United Kingdom Time | 00:00 |
| Portsmouth Bantry | Ireland Time | 00:00 |
| Portsmouth Dade City | Eastern Time | 05:00 |
| Portsmouth Howrah | India Standard Time | -04:30 |
| Portsmouth Soběslav | Central European Time | -01:00 |
| Portsmouth Altona | Eastern Australia Time | -09:00 |
| Portsmouth Torrijos | Central European Time | -01:00 |
| Portsmouth Ranya | Arabian Time | -02:00 |
| Portsmouth Dwingeloo | Central European Time | -01:00 |
| Portsmouth Banská Štiavnica | Central European Time | -01:00 |
| Portsmouth Ciudad Colón | Central Time | 07:00 |
| Portsmouth Howell | Eastern Time | 05:00 |
| Portsmouth Snoqualmie | Pacific Time | 08:00 |
| Portsmouth Aguilar de Campoo | Central European Time | -01:00 |
| Portsmouth Toshima | Japan Time | -08:00 |