Swift number are the codes for all the bank branches of the world who are willing to participate in inter transaction of money. So for example if you want to send money to India and you are in USA than for doing wire transfer you will be required Swift number of that bank to which you want to transfer. Now you can easily go this website http://www.swift.com/biconline/ and just enter the bank name(say ICICI), City and Nation and you will get the codes. Please note that they don't have all the records in there database.
Although I will personally still suggest you to recheck the code with your bank. After all it is a matter of money 
Links you may find interesting -
- How to Send Money to India
- Records are meant to be broken –in India
- How to get a personal loan? Its Easy
- How to open an account with an Indian bank
- How to Buy Second Hand Mobile Sets (or from Gray Market) in India ?