011255 and +255 often work interchangeably from cell phones (use also to text Tanzanian numbers).
Arusha | 27 | Lindi | 23 | Ruvuma | 25 |
Coast Region | 23 | Mara | 28 | Shinyanga | 28 |
Dar es Salaam | 22 | Mbeya | 25 | Singida | 26 |
Iringa | 26 | Morogoro | 23 | Tabora | 26 |
Kagera | 28 | Mtwara | 23 | Tanga | 27 |
Kigoma | 28 | Mwanza | 28 | Zanzibar | 24 |
Kilimanjaro | 27 | Rukwa | 25 |