Montr�Al, Quebec (Canada)

Fixed at 3 characters (format: 'Letter-Number-Letter', e.g., M5V). The first letter represents the main province or geographic region; the second digit indicates a metropolitan area (1-9) or a rural remote area (0); the third letter represents the specific city area or small town.

Fixed at 3 characters (format: 'Number-Letter-Number', e.g., 2T6). It represents a more precise delivery range, such as a specific street, a large high-rise office building, a residential neighborhood block, or even a specific single institution with high mail volume.