Link of Zonal Railways |
| Central Railway |
North Frontier Railway |
| North Central Railway |
South East Central Railway |
| North Western Railways |
West Central Railways |
| Southern Railway |
Eastern Railway |
| East Coast Railway |
Northern Railway |
| North Eastern Railway |
South Eastern Railway |
| South Central Railway |
Western Railway |
| South Western Railway |
Kolkata Metro Railway |
| East Central Railway |
|