| Semaphore Bissone | Central European Time | 09:30 |
| Semaphore Bitan Aharon | Israel Time | 08:30 |
| Semaphore Bithan | India Standard Time | 05:00 |
| Semaphore Bithani Gaon | India Standard Time | 05:00 |
| Semaphore Birkdale | Eastern Australia Time | 00:30 |
| Semaphore Birkenau | Central European Time | 09:30 |
| Semaphore Birkenfeld | Central European Time | 09:30 |
| Semaphore Birmingham | United Kingdom Time | 10:30 |
| Semaphore Birmingham | United Kingdom Time | 10:30 |
| Semaphore Birch Run | Eastern Time | 15:30 |
| Semaphore Bioggio | Central European Time | 09:30 |
| Semaphore Biougra | Western European Time | 09:30 |
| Semaphore Bir Ali Ben Khlifa | Central European Time | 09:30 |
| Semaphore Bir Tam Tam | Western European Time | 09:30 |
| Semaphore Benjamín Hill | Mexican Pacific Time | 17:30 |
| Semaphore Carovigno | Central European Time | 09:30 |
| Semaphore Carpinteria | Pacific Time | 18:30 |
| Semaphore Cadiz | Central Time | 16:30 |
| Semaphore Cadereyta Jiménez | Central Time | 16:30 |
| Semaphore Cadalso | Central European Time | 09:30 |
| Semaphore Cadalso de los Vidrios | Central European Time | 09:30 |
| Semaphore Cabudare | Venezuela Time | 14:30 |
| Semaphore Cabrils | Central European Time | 09:30 |
| Semaphore Cabazon | Pacific Time | 18:30 |
| Semaphore Cabarete | Atlantic Time | 14:30 |
| Semaphore Cabramatta | Eastern Australia Time | -00:30 |
| Semaphore Cabrerets | Central European Time | 09:30 |
| Semaphore Cabo de Gata | Central European Time | 09:30 |
| Semaphore Bree | Central European Time | 09:30 |
| Semaphore Brecon | United Kingdom Time | 10:30 |
| Semaphore Breighton | United Kingdom Time | 10:30 |
| Semaphore Breitbrunn am Chiemsee | Central European Time | 09:30 |
| Semaphore Bray | Ireland Time | 10:30 |
| Semaphore Braybrook | Eastern Australia Time | -00:30 |
| Semaphore Braunston | United Kingdom Time | 10:30 |
| Semaphore Breaux Bridge | Central Time | 16:30 |
| Semaphore Brent Park | United Kingdom Time | 10:30 |
| Semaphore Bremgarten | Central European Time | 09:30 |
| Semaphore Breña | Peru Time | 15:30 |
| Semaphore Byford | Western Australia Time | 02:30 |
| Semaphore Byrdstown | Central Time | 16:30 |
| Semaphore Byrnihat | India Standard Time | 05:00 |
| Semaphore Byron | Eastern Time | 15:30 |
| Semaphore Byron Bay | Eastern Australia Time | -00:30 |
| Semaphore Bytča | Central European Time | 09:30 |
| Semaphore Breuberg | Central European Time | 09:30 |
| Semaphore Breuil-Cervinia | Central European Time | 09:30 |
| Semaphore Brevard | Eastern Time | 15:30 |
| Semaphore Briançon | Central European Time | 09:30 |
| Semaphore Brick | Eastern Time | 15:30 |