| Village | Old Deka |
| Block | Nari-seren |
| District | East Siang |
| State | Arunachal Pradesh |
| 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 | English |
| Time difference | -45 minutes |
| Latitude | 27.14 |
| Longitude | 93.61 |
Old Deka is a village panchayat located in the East Siang district of Arunachal-Pradesh state,India. The latitude 27.14 and longitude 93.61 are the geocoordinate of the Old Deka.
The surrounding nearby villages and its distance from Old Deka are Depi , Depi Moli , Detak , Lower Namey , Lumpo , Nari , New Deka , New Telam , Pam , Potte , Seren , Telam , Upper Namey .
The native language of Old Deka is English and most of the village people speak English. Old Deka people use English language for communication.
Old Deka village is located in the UTC 5.30 time zone and it follows indian standard time(IST). Old Deka sun rise time varies -45 minutes from IST. The vehicle driving side in Old Deka is left, all vehicles should take left side during driving. Old Deka people are using its national currency which is Indian Rupee and its internationl currency code is INR. Old Deka phones and mobiles can be accesed by adding the indian country dialing code +91 from abroad. Old Deka people are following the dd/mm/yyyy date format in day-to-day life. Old Deka domain name extension( cTLD) is .in .