Open the page and check a code
No sales call, API key or import. Paste a US ZIP or any of the other 81 countries and get the place, region and format in one screen.
COMPARE · POSTCODEDOG VS ZIP-CODES.COM
PostcodeDog vs ZIP-Codes.com
A free lookup for 82 countries, not a data contract.
ZIP-Codes.com sells licensed US and Canadian postal data, APIs and databases. PostcodeDog is a ready lookup: paste an address or code, check the format, run a batch, or call the API and MCP — free and without a contract.
SIDE BY SIDE
What changes with PostcodeDog
| Capability | UsPostcodeDog | ZIP-Codes.com | Why it matters |
|---|---|---|---|
| Coverage | 82 countries in one lookup | United States and Canada | Cross-border destinations go beyond North America. |
| Access | Free, no account | Commercial API, database and data products | A quick check should not need a contract. |
| Form | Lookup page, batch page, API and MCP in one product | API, database and data products | Support and operations can use it without a client. |
| Batch | Paste up to 50 rows, review, export CSV | Bulk data and API workflows | A small queue can be cleared without setup. |
| Languages | 13 interface languages | English data product | Local teams can work in their own language. |
WHERE POSTCODEDOG WINS
A lookup, not a data contract.
Batch before the label run
Fifty rows per run in the browser, with valid, ambiguous and missing statuses and a CSV export. The operations team can start without a contract.
Same lookup for people and agents
The JSON API and MCP server are part of the free product, not an enterprise add-on. Support, checkout and AI clients all reach the same lookup.
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 ZIP-Codes.com
ZIP-Codes.com provides US and Canadian postal code data, REST APIs, downloadable databases and address validation, with USPS and Canada Post licensed data. It is a data product for teams that need bulk or embedded data.
PostcodeDog covers 82 countries in a browser lookup with batch, API and MCP, and is free to use.
When PostcodeDog is the better fit
- 01You need an on-demand lookup, not a bulk dataset.
- 02Your destinations include the US and at least one other country.
- 03You want a free batch check before a label run.
- 04You want an API or MCP server without a data contract.
Is ZIP-Codes.com free?
ZIP-Codes.com is a commercial data provider, with pricing that depends on the dataset or API. PostcodeDog’s lookup, batch, API and MCP are free.
Can PostcodeDog replace a licensed data product?
They solve different jobs. ZIP-Codes.com is built for bulk licensed data; PostcodeDog is built for on-demand postal-code checks, batch and agents.
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
Check a code without a contract.
Try 90210, SW1A or 100-0001. No signup, no sales call.