Dear Sourav,
The Procedure for knowing your Ward/Circle has been very simplified by the Introduction of this feature in the NSDL Website. Just go to the NSDL Website and fill out a New PAN application form.
https://tin.tin.nsdl.com/pan/index.html
This link will take you to fill up the PAN Application -FORM 49A. Just Click on "Dont know AO Details" -Don`t know AO details?
For Non International Taxation AO details
Then click on the initials of the city in which the assessee belongs to. For example if I live in Mangalore, then i would click "M"
Then click on you city. It displays an entire list of Wards/Circles in your City. In Mangalore if an assessee is having an income of more than 5 lakhs, then his Jurisdiction is DCIT Circle 1- Mangalore. And if the assessees house is situated in 1st Municipal Ward ( Ward No: Usually the first numeral in your Door No.), then his Jurisdiction would be ITO Ward 1(2)
"All persons (other than salary cases) carrying on business or profession or residing in old Municipal Ward No.1, 2, 3, 4 and 14 of Mangalore City Municipal Corporation and the area covered from Pumpwell upto Kannur including Padil and Bajaal in Mangalore Taluk."
Please read through this section caefully and know your correct Jurisdiction.
Cheers,
Viggi