Siwan STD Code
| City | Siwan |
| STD Code | 06154 |
| District | Chapra |
| State | Bihar |
STD Code of Siwan is 06154. This city is located in Chapra district of Bihar state in India. To call landline phones of Siwan, you must add 06154 before the number.
| City | Siwan |
| STD Code | 06154 |
| District | Chapra |
| State | Bihar |
STD Code of Siwan is 06154. This city is located in Chapra district of Bihar state in India. To call landline phones of Siwan, you must add 06154 before the number.
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