| Village | Koilwan |
| Block | Haspura |
| District | Aurangabad |
| 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 | -8 minutes |
| Latitude | 24.751897 |
| Longitude | 84.377747 |
Koilwan is a village panchayat located in the Aurangabad district of Bihar state,India. The latitude 24.751897 and longitude 84.377747 are the geocoordinate of the Koilwan.
The surrounding nearby villages and its distance from Koilwan are Itwan , Haspura , Dindir , Dumara , Jaitpur , Ahiyapur , Malhara , Sonhathu , Tal , Amjhar , Piru , Dhusari , Purhara .
The native language of Koilwan is Hindi,Urdu and most of the village people speak Hindi,Urdu. Koilwan people use Hindi,Urdu language for communication.
Koilwan village is located in the UTC 5.30 time zone and it follows indian standard time(IST). Koilwan sun rise time varies -8 minutes from IST. The vehicle driving side in Koilwan is left, all vehicles should take left side during driving. Koilwan people are using its national currency which is Indian Rupee and its internationl currency code is INR. Koilwan phones and mobiles can be accesed by adding the indian country dialing code +91 from abroad. Koilwan people are following the dd/mm/yyyy date format in day-to-day life. Koilwan domain name extension( cTLD) is .in .