| Village | Dumarshan |
| Block | Mashrakh |
| District | Saran |
| State | Bihar |
| Country | India |
| Continent | Asia |
| Time Zone | IST ( UTC + 05:30) |
| Currency | Indian Rupee ( INR ) |
| Dialing Code | +91 |
| Date format | dd/mm/yyyy |
| Driving side | left |
| Internet cTLD | in |
| Language | Hindi,Urdu |
| Time difference | -11 minutes |
| Latitude | 25.62 |
| Longitude | 85.13 |
Dumarshan is a village panchayat located in the Saran district of Bihar state,India. The latitude 25.62 and longitude 85.13 are the geocoordinate of the Dumarshan.
The surrounding nearby villages and its distance from Dumarshan are Bangra , Gangauli , Madarpur , Nawada , Arana , Baharuli , Chand Kudariya , Durgauli , Jajauli , Karan Kudariya , Kawalpura , Khajuri , Mashrak , Mashrak Purabi , Mashrakh , Semari , Sonauli .
The native language of Dumarshan is Hindi,Urdu and most of the village people speak Hindi,Urdu. Dumarshan people use Hindi,Urdu language for communication.
Dumarshan village is located in the UTC 5.30 time zone and it follows indian standard time(IST). Dumarshan sun rise time varies -11 minutes from IST. The vehicle driving side in Dumarshan is left, all vehicles should take left side during driving. Dumarshan people are using its national currency which is Indian Rupee and its internationl currency code is INR. Dumarshan phones and mobiles can be accesed by adding the indian country dialing code +91 from abroad. Dumarshan people are following the dd/mm/yyyy date format in day-to-day life. Dumarshan domain name extension( cTLD) is .in .