What data source does this use?

The tool queries the free Zippopotam.us public API, which provides city, state, county, and coordinate data for all US ZIP codes. No API key is required.

Does it work for ZIP+4 codes?

Enter just the first 5 digits. The tool only uses the 5-digit base ZIP code for lookup.

How accurate are the coordinates?

Coordinates represent the centroid of the ZIP code area. They are accurate enough to place the ZIP on a map but may not correspond to a specific street address.

Can I look up Canadian or other postal codes?

This tool is optimized for US ZIP codes. For other countries, the underlying Zippopotam.us API supports additional country codes, but the interface focuses on the US.

Utility 無料サインアップ不要

ZIP Code Lookup

Look up US ZIP code details: city, state, county, coordinates, and a map.

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Enter any 5-digit US ZIP code to instantly retrieve its city, state, county, latitude, and longitude using the free Zippopotam.us API — no sign-up or API key required. Results are displayed alongside an OpenStreetMap iframe centered on the exact coordinates. The tool also lists nearby ZIP codes that share the same city or place name, and provides a direct link to view the location on OpenStreetMap.

使い方

1 Type a 5-digit US ZIP code in the input field.
2 Click Lookup (or press Enter).
3 View the city, state, county, and coordinates.
4 Scroll down to see the embedded OpenStreetMap centered on the ZIP code.
5 Use the 'Nearby ZIP codes' list to explore adjacent areas.

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使い方

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