Eastern Region Office

Designation	Telephone Numbers	Email address
Shri A K Chatterjee Scientist-E & Head (KKBO-I)	033-2367-0017, 033-2367-0014, 033-2367-0013	hkkbo[at]bis[dot]gov[dot]in
Shri A K Purohit Scientist-E & Head (KKBO-II)	033-2367-0016, 033-2367-0014, 033-2367-0013	kkbo-2[at]bis[dot]gov[dot]in
Shri S. Basu Scientist-E & Head (EROL)	Tel: 033-23556587, Fax : 033-23555300	erol[at]bis[dot]gov[dot]in

Administrative Office	Sales Point
6th Floor, Plot No 7/7 & 7/8 CP Block, Sector V Salt Lake Kolkata West Bengal 700091 Tel : 033-2367-0014, 033-2367-0013, 033-2367-0012 Grams : Manaksanstha Email : ero[at]bis[dot]gov[dot]in	5 Chowringhee Approach, P. O. Princep Street, Kolkata – 700072 Tel: 033- 22371085 Email : salesero[at]bis[dot]gov[dot]in

Last Updated on July 26, 2022