ZIP2CD by gamma0w

Highlights ZIP codes and shows their congressional district on hover.

Experimental

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You'll need Firefox to use this extension

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About this extension

This extension finds ZIP codes (including ZIP+4) on your screen. Found ZIPs are indicated by a subtle grey dotted line underneath. When you hover over the ZIP, the extension calls an API that returns the congressional district in which that ZIP code is found. Note: many ZIP codes span multiple districts; where applicable, this is made clear. The restriction mode allows you to specify a district of your choice. Your chosen district will display as normal, but all other districts would be clearly marked as out of district.

To use this extension, you will have to create a free API key from Geocodio. Enter the extension's preferences to add your key.

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Release notes for 1.0

Introducing ZIP2CD, an extension that highlights ZIP Codes and converts them to congressional districts on hover.

If you would rather look for a specific district, you can target one in preferences, and all other ZIPs will be clearly marked as being out of district.

Required permissions: