This pin code is of Collectorate Siwan. If you want to get your mail, parcel or courier delivered to this particular address Collectorate Siwan, you will have to mention the correct postal code. You can browse through our website to obtain the postal code of any place or to locate the address of a specific pin code.The pin code of Collectorate Siwan is 841226 Pin Code of India endeavors to render the correct information of the postal codes of all the states of India.