Hello Bharathi, The Contact Number of the National banking school head office + plus their branches contact number with email id is mentioned in below LINK... 

 

Link - http://nsbindia.net/enquiry/

 

All the Best

Is there any particular banking school you want to know about?
National Institute of Bank Managment, Pune is one of the good schools offering a PGDM in Banking and Finance Services. It was established in 1969 by the Reserve Bank of India, in consultation with the Government of India, as an autonomous apex institution for research, training, education and consultancy in bank management.

Please visit their website for more details

http://www.nibmindia.org