How to find commissionarate, division, range of service tax

Dear Sir,  

I am doing online new service tax registration and facing difficuty in filling Commissionerate--- Division--- Range---   I don't know the this details how to find (i am staying Khirki Extension, Malviya Nagar, New Delhi-110017)

Commissionerate .......? (i dont know) 

Division..........? (i dont know)

Range---         (i dont know the division)  

can you all help me at the earliest.

Awadhesh Kumar Singh