12v.github.io/boundary-mapper/

Postcode => Westminster constituency converter

Enter a UK postcode and this tool returns the constituency it belongs to
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In United Kingdom of Great Britain and Northern Ireland 🇬🇧
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Postcode => Westminster constituency converter
Project type: Tool or platform
Categories: Mapping, Mapping tools, Civic data, General purpose open source tools, Open source
Last modified: Nov 12, 2025 Added: Jan 15, 2024

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