Draw an area on the map and this tool will return a list of postcodes inside the area. (In Great Britain only, and limited to geographic areas of up to 15 sq km.) To use the tool:
find a location on the map,
click the Polygon button,
draw an area on the map by clicking or tapping, and
click the Postcodes button.
About the data
This tool uses postcode data from the February 2017 release of Ordnance Survey's Code-Point Open product. You can use this data subject to the terms of the Open Government Licence. Following is the attribution statement: