Map
General Information
| Postal Area | Wirral |
| Postcode | CH1 1AA |
| User Type | Large (more than 25 items of mail per day) |
| Region | North West |
| Country | England |
| Local authority | Cheshire West and Chester |
| Introduction Date | 1990-02-01 |
| Termination Date | 2020-06-01 |
Geographic Information
| Latitude | 53.1903460 |
| Longitude | -2.8882190 |
| Easting | 340750 |
| Northing | 366286 |
| Quality | Within the building of the matched address closest to the postcode mean |