NCB) is an Indian central law enforcement and intelligence agency under the Ministry of Home Affairs, Government of India.

Its field units and offices are organised by zones and are located in Mumbai, Indore, Kolkata, Delhi, Chennai, Lucknow, Jodhpur, Chandigarh, Jammu, Ahmedabad, Bengaluru, Guwahati and Patna.

[1] In wake of recent cadre restructuring in NCB, new offices were opened at Agartala, Raipur, Visakhapatnam, Gorakhpur, Jalpaiguri, Itanagar, Bhopal, Cochin, Jaipur, Srinagar.

[4] NCB is affiliated to Home Ministry, which was made responsible for administering The Narcotic Drugs and Psychotropic Substances Act, 1985.

[2] The NCB also monitors India's frontiers to track down points where smuggling activities take place with foreign traffickers.