Hello! Unfortunately, there is no comprehensive and fully updated Excel file available online that contains a complete list of regions, provinces, cities, and barangays in the Philippines. However, you can try visiting the official website of the Philippine Statistics Authority (PSA) and the Department of the Interior and Local Government (DILG) for some data on regions, provinces, cities, and municipalities. You can also check the Open Data Philippines website for some datasets that you might find helpful. If you need further assistance, please let me know!