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BSNL Units
| Telecom Circles | |
| Andaman & Nicobar | Andhra Pradesh |
| Assam | Bihar |
| Chhattisgarh | Gujarat |
| Haryana | Himachal Pradesh |
| Jammu & Kashmir | Jharkhand |
| Karnataka | Kerala |
| Madhya Pradesh | Maharashtra |
| North East-I | North East-II |
| Odisha | Punjab |
| Rajasthan | Sikkim |
| Telangana | Tamil Nadu |
| Uttar Pradesh East | Uttar Pradesh West |
| West Bengal | |
| Training Institutions | |
| Advanced Level Telecom Training Centre | BRBRAITT |
| Metro Districts | |
| Kolkata | Chennai |
| Core Network Transmission Circles | |
| Core Network(TX-North) | Core Network(TX-South) |