Global Address Lab Fictional address examples, postal lookup, and format tools for QA workflows.
Area-level samples · Not exact-address lookup · Synthetic examples
Postal lookup + format checker

UK Postcode Lookup

Enter a United Kingdom postal code to check its format, view area-level sample data, and generate a fictional test address for that area.

Format: SW1A 1AA
Precision: Area / locality level
Sample coverage: 27450 area records
Exact address: Not inferred from postal code alone
Lookup result SW1A 1AA

Valid format. Area-level sample data found. This is not a specific street-address lookup.

Country United Kingdom
State / region England
City / locality London
Lookup precision Postal area

Synthetic test address for this area

4831 Hill Avenue
London
SW1A 1AA
United Kingdom
Open address generator

United Kingdom postal code format notes

UK postcodes include outward and inward parts. They can be precise, but full address lookup normally requires licensed address data.

Structural pattern
^[A-Z]{1,2}\d[A-Z\d]?\s?\d[A-Z]{2}$
Format example
SW1A 1AA

Can a postal code show a specific address?

Usually no. A postal code typically identifies a postal area, locality, or delivery range. It should not be presented as a specific street and house number without licensed address data.

Postal area data source

GeoNames · Imported: 2026-06-29 · 27,450 area records

United Kingdom postal code lookup FAQ

Can a UK postcode show a specific street address?

Usually no. A UK postcode typically identifies a postal area, locality, or administrative region. It should not be treated as a specific street and house number.

Is this postal lookup official delivery verification?

No. This tool uses GeoNames area-level postal data and local samples for format learning, QA, and test data. It does not guarantee deliverability.

Why can a valid postal code return no area result?

Format validation only checks the visible structure. Area results depend on the current dataset coverage; unmatched values are shown as format-only results.

Can I generate a test address from a postal lookup result?

Yes. When an area-level match is found, the page can generate a fictional test address for forms, imports, and development workflows. It is not a real address claim.