Map
General Information
| Postal Area | Blackburn with Darwen |
| Postcode | BB1 1TZ |
| User Type | Large (more than 25 items of mail per day) |
| Region | North West |
| Country | England |
| Local authority | Blackburn with Darwen |
| Introduction Date | 1990-02-01 |
| Termination Date | 1994-05-01 |
| IMD 2025 | Decile 1 (most deprived = 1, least = 10) Rank 2,615 of 33,755 English Indices of Deprivation 2025 |
Geographic Information
| Latitude | 53.7438950 |
| Longitude | -2.4593810 |
| Easting | 369800 |
| Northing | 427600 |
| Quality | Postcode terminated prior to Gridlink® initiative, last known ONS postcode grid reference |