I receive lot of phone calls daily, most of them are from mobile phones and operators are releasing new series everyday so it is hard for everyone to know from which state and which operator we got call or miss call.

I advise using one of these two option to trace mobile no.

Using Wiki – Using Wikipedia you can find list of first 4 digit on mobile no. and check that which operator operate this on which state. They have regularly updated list so you will get list of all no. First 2 digit are operator code and 3rd and 4th are zone code and rest 6 digit are subscriber number.
Link – Mobile telephone numbering in India

Another way of tracing is they way I use. It is very simple, you just need to enter mobile numbers and no need to find anything in big list. There are lot of sites available which provide this type of services, you can just Google for it and you will get a big list.
I use this site – Trace Mobile Numbers in India