011975 and +975 often work interchangeably from cell phones (use also to text Bhutan numbers).
Bumthang Region | 3 | Ha | 8 | Sarpang | 6 |
Chukha | 5 | Mongar | 4 | Thimphu | 2 |
Gedu | 5 | Phuntsholing | 5 | Trongsa | 3 |
Gomtu | 5 | Samdrup Jonkhar | 7 | Wangdue | 2 |
Gelephu | 6 | Samtse | 5 | Yangtse | 4 |