BTC |
| BTC Bulgarian Telecommunications Company (BTC) |
| BTC Bulgarian Telecommunications Company (BTC) - Phones |
| BTC Bulgarian Telecommunications Company (BTC) |
| BTC rates guide - Dial Code : 190 |
| BTC local calls rates - Dial Code : 152 |
| BTC long-distance within Bulgaria calls rates - Dial Code : 153 |
| BTC international calls rates - Dial Code : 154 |
| BTC international calls rates - Dial Code : 157 |
| BTC assistance - Dial Code : 170 |
| BTC information - Dial Code : 176 |
| BTC digital services information - Dial Code : 186 - Dial Code : 188 |
| BTC rates guide - Dial Code : 190 |
| BTC terms of payment - Dial Code : 198 |
| Automatic telephone information guide - Dial Code : 199 |