FREE TOOL

ZIP code lookup

One ZIP in, the whole record out: city, county, timezone, population, elevation, and its neighbors.

Free, no signup.

THE API UNDERNEATH

GET /postal/33139?country=US

This page is that call, running from your browser. Every field shown rides one lookup, and the same shape covers postcodes in nine countries. Same endpoint on every plan, one pooled request per lookup.

ZIP code APIZIP radiusCounty by ZIP

QUESTIONS

What comes back?
The city, state, county with its FIPS code, timezone, population, elevation, coordinates, and the neighboring ZIP codes, all from one lookup.
Why does my ZIP show a different city name?
Each ZIP carries one primary place name from official postal data. Neighborhoods and acceptable alternate names map to the same code.
Do ZIP+4 codes work?
Type the full thing and the first five digits are used. The +4 narrows to a block or building and has no separate record.
Can I do this from code?
Yes. This page is GET /postal/{code}, one call, and the same shape covers postcodes in nine countries. One pooled request per lookup.
I have a whole spreadsheet of ZIPs.
Drop the file on /bulk. Every ZIP column gets city, state, county, and the rest back as new columns.