Not .Sure why it was changed. but when it is called Calcutta, it includes the suburbs. 
 Really? Why was the name changed? 
 It is! Actually the second larges city in India after Mumbai. During the mid 1980's Mumbai actually overtook Kolkata. 
 Thank you so much for all your help! 
 Hi, can you tell me about Kolkata please?
It is! Actually the second larges city in India after Mumbai. During the mid 1980's Mumbai actually overtook Kolkata.