Department of Trade and Industry — Ilocos Sur Provincial Office

DTI provincial office. Contact the office for business registration and enterprise-support inquiries. Independent directory entry compiled from public sources, reviewed 23 October 2026. This listing is not owner-claimed; contact responsiveness has not been tested. Source: https://dtiwebfiles.s3-ap-southeast-1.amazonaws.com/Directory/15%20May_DTI%20Directory%20of%20Key%20Officials_NBR%205152026_For%20uploading.pdf