How to Identify the Indian State / Union Territory / Metro a BSNL cellphone belong to?

I came across this table below to identify the home state (Indian) to which a a BSNL (Bharat Sanchar Nigam Ltd) cellphone belong to. For example, if the cell phone number is 9447100100, its first 4 digits are 9447, which belong to Kerala state as per the lookup table given below.



Andaman & Nicobar Islands (A&N) 9479, 9432
Andhra Pradesh (AP) 9473 , 9440, 9441
Assam 9478
Bihar 9475, 9431
Chennai 9470, 9444
Kolkata 9481
Gujrat 9457,9426
Haryana 9450, 9416
Himachal Pradesh (HP) 9451,9418
Jammu & Kashmir (J&K) 9452,9419
Karnataka 9471, 9448
Kerala 9472, 9447
Madhya Pradesh (MP) 9458,9425
Maharastra 9456, 9422
North East (NE) states 9477
Orissa 9476, 9437
Punjab 9453, 9417
Rajasthan 9459, 9414
Tamil Nadu (TN) 9480, 9443
Utter Pradesh (UP) East 9455, 9415
Utter Pradesh (UP( West 9454, 9412
West Begnal (WB) 9474, 9434




As of now, I do not have the similar kind of information for other mobile providers in India. I will publish it as soon as I get the information.

Hope this helps. Please post more BSNL numbers if I am missing any in this list.