GB United Kingdom Major Regions Postal Code Details
🏛️ West Dunbartonshire · Scotland
G83 8NB
Alexandria
G83 8QL
Balloch
G83 9DX
Bonhill
G60 5BB
Bowling
G82 2RS
Broadmeadow Industrial Estate
G81 3AF
Clydebank
G81 4JQ
Dalmuir
G82 2BN
Dumbarton
G81 6AS
Duntocher
G83 8RR
Gartocharn
G81 6AU
Hardgate
G83 9NN
Jamestown
G82 2TJ
Milton
G60 5AN
Old Kilpatrick
G82 4DE
Renton
📮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).