No ETL before the first lookup
GeoPostcodes is a dataset. PostcodeDog is the finished lookup: type a code and get a place, region and format, with a country page that explains the local rules.
COMPARE · POSTCODEDOG VS GEOPOSTCODES
PostcodeDog vs GeoPostcodes
The data product, without the data project.
GeoPostcodes sells a global postal-code database and related datasets. PostcodeDog turns open postal data into a ready lookup: type an address or code, check the place and format, run a batch, or connect an agent.
SIDE BY SIDE
What changes with PostcodeDog
| Capability | UsPostcodeDog | GeoPostcodes | Why it matters |
|---|---|---|---|
| Form | Lookup page, batch page, API and MCP | Database and data products | No import or licence step before the first answer. |
| Access | Free, no account | Commercial licence | A quick check stays free. |
| Input | Paste an address, city or code; format detected | Import data into your stack | Use the customer’s text as-is. |
| Batch | Paste up to 50 rows, review, export CSV | Bulk data and GIS workflows | Operations can clear a queue without a pipeline. |
| AI agents | Built-in MCP server at /mcp | — | Connect the lookup to Claude, Cursor or an internal agent. |
WHERE POSTCODEDOG WINS
Open data, without the data pipeline.
Built for the label desk
Batch checks, platform pages and carrier pages turn the data into the steps a shipping team actually performs, instead of leaving it as a file to interpret.
One source for people and agents
The same data is reachable from the web box, the JSON API and the MCP server, with the GeoNames attribution kept on the data page.
TRY IT
Try the difference
Paste a full address, a city or a post code. Country and format are detected.
Free. No account, no API key.THE LOOP
Paste → resolve → verify
The same three steps work whether the address is a US ZIP, a UK outcode or a Japanese 〒.
- 01
Paste what you have
A full address, a city, or just a code. The parser accepts the whole line.
- 02
Confirm the place and format
Country, region and post code format are shown together, with nearby codes for a second option.
- 03
Send it to the label
Copy the verified code or export the batch. Platform and carrier pages keep local rules in view.
About
About GeoPostcodes
GeoPostcodes provides a world postal-code database, boundary data, cities and address datasets used in analytics, logistics and GIS.
PostcodeDog is a free 82-country lookup with batch, API and MCP, built on open GeoNames data.
When PostcodeDog is the better fit
- 01You want a lookup without buying or importing a database.
- 02Your team checks addresses in a browser.
- 03You want batch checks and CSV export out of the box.
- 04You want an MCP server for AI clients.
Is GeoPostcodes a lookup?
GeoPostcodes is a data product for teams building with postal data. PostcodeDog is a ready lookup with a browser, batch, API and MCP.
Does PostcodeDog use GeoPostcodes data?
No. PostcodeDog uses open GeoNames data, and the data page keeps the attribution and coverage notes.
Is PostcodeDog free?
Yes. Lookups, batch checks, the JSON API and the MCP server are free and need no account.
Can I use it in an AI agent?
Yes. The MCP server is at /mcp, and the JSON API is free to call.
Compare
Skip the pipeline. Start with a lookup.
Try a code from any of the 82 countries. The data page keeps the attribution.