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Telephone codes of cities and regional centres
| Barguzin | 30131 |
| Bichura | 30133 |
| Gusinoozersk | 30145 |
| Zaigraevo | 30136 |
| Zakamensk | 30137 |
| Kizhinga | 30141 |
| Kurumkan | 30149 |
| Kyakhta | 30142 |
| Mukhorshibir' | 30143 |
| Petropavlovka | 30134 |
| Sosnovo Ozerskoe | 30135 |
| Tarbagataj | 30146 |
| Turuntaevo | 30144 |
| Ulan Udeh | 30122 |
| KHorinsk | 30148 |
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