Example of a UK Postcode: SW1P 3ST

Decoding a London Postcode

SW1P 3ST (used for parts of Westminster) illustrates the format:

• SW – Postcode area (South West London)
• 1 – District within area
• P – Sector (delivery office)
• 3ST – Unit (specific addresses)

UK postcodes are alphanumeric, 5–7 characters, enabling precise routing.