AO Code is a combination of Area Code, AO Type, Range Code and AO Number. Applicants for PAN are required to provide the AO code in their application. This information can be obtained from the Income Tax Office. Applicants may search their AO Codes on the basis of description wherever provided. The list of AO codes given below is to help the PAN applicant to choose the AO codes under whose jurisdiction the applicant of new PAN falls. The AO code for a given PAN may change across time as per the policy of Income Tax Department (PAN in such cases remains the same). To know the AO under whom the PAN holder is assessed at any point of time, the applicant will have to contact the local Income Tax Office.