Use 5-digit postal codes to carve geographic territories in Taiwan and Vietnam. In Mexico, use 5-digit contiguous postal codes. Add a boundary from an alignment, and then plan territories in those countries the same way you plan other geographic territories.
Where: This change applies to Lightning Experience in Enterprise, Performance, and Unlimited editions. A Sales Planning add-on license is required.
How: From an alignment, open Settings, select Geographic Fields, select Add Boundaries, select the postal-code boundary, and apply your changes.