East Central Railway zone
The East Central Railway (ECR) is one of the 19 railway zones in India, serving primarily the eastern and central regions of the country. Headquartered in Hajipur, Bihar, the zone manages a vast network of railway lines across five divisions: Sonpur, Samastipur, Dhanbad, Danapur & Deen Dayal Upadhyaya == History == Prior to 1996–97, the Indian Railways consisted of nine zones.
Source: Wikipedia — East Central Railway zone (CC BY-SA 4.0)