What is the biggest postcode area?

Related questions

1. Why do postcodes change?
2. How do I change my zip code to postal code?
3. Can postcodes change?
4. Can two houses have the same postal code?
5. How are postcodes decided?
6. How does the UK postcode system work?
7. Is zip code and PIN code same?
8. What do the letters in a postcode mean?
9. Are postal codes house specific?
10. Is your postcode unique to your house?

Tags

1. #crown
2. #geographical
3. #covering
4. #areas
5. #these
6. #initial
7. #geographic
8. #postcode
9. #combined
10. #characters
11. #guernsey
12. #forms
13. #largest
14. #alphanumeric
15. #jersey
16. #currently
17. #there
18. #often
19. #further
20. #dependencies