GB United Kingdom Major Regions Postal Code Details
📋 United Kingdom Address and Delivery Guidance
Include the recipient name, building or street address, locality, region where applicable, postal code when the destination uses one, and the destination country or territory.
Use the language, character set and address order requested by the recipient, official postal operator or carrier. Do not assume every destination uses the same postal-code format.
Confirm the postal code, service coverage and any customs or carrier requirements with the recipient and the relevant official postal operator before shipping.
Postal codes help routing only in territories that use them. Accurate recipient details remain essential for delivery in every destination.
Postal information, sources and verification
Use this page as a routing reference and confirm the complete address, postal code format and delivery restrictions with the relevant official postal operator or carrier before dispatch.
Editorial and service accountability
This postal-code reference is maintained by the 56ok.com logistics-content team for international shipping preparation. It is reviewed against publicly available postal-operator information; it is not an official postal authority and does not replace carrier or customs instructions.
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Your search terms are handled under our Privacy Policy. Review our Terms of Service and disclaimer before relying on any logistics or delivery information.
📮United Kingdom Postal FAQ and delivery guidance
📮 What is the basic format of a UK postcode?
A UK postcode consists of 5-7 alphanumeric characters, split into two parts: the outward code (area and district) and inward code (specific street/building). Examples: SW1A 1AA (London) or M1 1AE (Manchester).
🔍 How to find or validate a UK postcode?
Use Royal Mail's free Postcode Finder tool on their official website to search by address, or third-party APIs for validation.
⚠️ What happens if I write a wrong postcode?
Incorrect postcodes may cause delays, returns, or lost mail. For important items, use Tracked services and double-check the recipient's postcode.
📬 Is a postcode mandatory for UK mail?
Yes! Postcodes are essential. Mail without a postcode or with errors faces significant delivery issues. Always write the postcode on a separate line at the end of the address (e.g., London SW1A 1AA).