GB United Kingdom Major Regions Postal Code Details
🏛️ Carmarthenshire (sir Gaerfyrddin) · Wales
SA33 6HD
Blaenycoed
SA33 6HB
Blaenycoed
SA33 6HA
Blaenycoed
SA33 6EY
Blaenycoed
SA33 6EU
Blaenycoed
SA33 6EX
Blaenycoed
SA33 6ET
Blaenycoed
SA33 6ES
Blaenycoed
📮GB United Kingdom Regional Postal Code FAQ & Postal Regulations
📮 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).