Dumka STD Code
| City | Dumka |
| STD Code | 06434 |
| District | Deoghar (Dumka) |
| State | Bihar |
STD Code of Dumka is 06434. This city is located in Deoghar (Dumka) district of Bihar state in India. To call landline phones of Dumka, you must add 06434 before the number.