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Indian Railways organizational structure is divided into 17 zones, which are further sub-divided into various city wise divisions. All RRBs official website links and contact E-Mail List Visit – http://www.rrcb.gov.in/rrbs.html

1. Central Railway (CR) – Mumbai

2. East Central Railway (ECR) – Hajipur
3. East Coast Railway (ECoR) – Bhubaneswar
4. Eastern Railway (ER) – Kolkata
5. North Central Railway (NCR) – Allahabad
6. North Eastern Railway (NER) – Gorakhpur
7. North Western Railway (NWR) –  Jaipur
8. Northeast Frontier Railway (NFR) –     Guwahati
9. Northern Railway Railway (NR) – Delhi
10. South Central Railway (SCR) – Secunderabad
11. South East Central Railway (SECR) – Bilaspur
12. South Eastern Railway (SER) – Kolkata
13. South Western Railway (SWR) – Hubli
14. Southern Railway (SR) – Chennai
15. West Central Railway (WCR) – Jabalpur
16. Western Railway (WR) – Mumbai
17. Metro Railway, Kolkata  – Kolkata