US ZIP codes to county, time zone and demographics

Who it's for

Anyone who has ZIP codes and needs the facts behind them, from a spreadsheet user to an AI agent.

Try it

Enter up to 10 ZIP codes. Ziplore returns the county, time zone and Census numbers for each.

Real sample output

Captured from a live call to this API (trimmed for length).

{
  "results": [
    {
      "query": "10001",
      "zip": "10001",
      "city": "New York",
      "state": "NY",
      "stateName": "New York",
      "county": "New York County",
      "countyFips": "36061",
      "stateFips": "36",
      "latitude": 40.7484,
      "longitude": -73.9967,
      "timezone": "America/New_York",
      "utcOffset": "-04:00",
      "observesDst": true,
      "zipKind": "area",
      "population": 30511,
      "populationDensity": 48895.8,
      "medianAge": 35.8,
      "medianHouseholdIncome": 129852,
      "perCapitaIncome": 120099,
      "medianHomeValue": 561100,
      "medianGrossRent": 3361,
      "housingUnits": 18356,
      "ownerOccupiedPct": 24.1,
      "landSqMi": 0.624,
      "waterSqMi": 0,
      "counties": [
        {
          "fips": "36061",
          "landShare": 1
        }
      ]
    },
    {
      "query": "90210",
      "zip": "90210",
      "city": "Beverly Hills",
      "state": "CA",
      "stateName": "California",
      "county": "Los Angeles County",
      "countyFips": "06037",
      "stateFips": "06",
      "latitude": 34.0901,
      "longitude": -118.4065,
      "timezone": "America/Los_Angeles",
      "utcOffset": "-07:00",
      "observesDst": true,
      "zipKind": "area",
      "population": 19004,
      "populationDensity": 1768.1,
      "medianAge": 51.9,
      "medianHouseholdIncome": 187801,
      "perCapitaIncome": 147098,
      "medianHomeValue": 2000000,
      "medianGrossRent": 3251,
      "housingUnits": 9531,
      "ownerOccupiedPct": 70.7,
      "landSqMi": 10.748,
      "waterSqMi": 0.054,
      "topCoded": [
        "medianHomeValue"
      ],
      "counties": [
        {
          "fips": "06037",
          "landShare": 1
        }
      ]
    }
  ],
  "count": 3,
  "notFound": [],
  "meta": {
    "sources": {
      "zipCodes": "GeoNames postal codes (2026-09-24)",
      "areas": "US Census 2024 Gazetteer (ZCTA)",
      "demographics": "American Community Survey 2020–2024 5-year estimates",
      "counties": "US Census 2020 ZCTA-to-county relationship file"
    },
    "attribution": "ZIP data: GeoNames (CC BY 4.0), US Census Bureau; time zones: timezone-boundary-builder (ODbL, © OpenStreetMap contributors).",
    "dataBuiltAt": "2026-09-26T00:23:52.950Z",
    "version": "1.0.0"
  }
}

Limits, plainly

Free and rate limited so it stays fast for everyone. A bulk version (100 ZIPs per call, 250-mile radius) is coming to the Apify Store and RapidAPI.

• 20 calls per minute per IP address.
• Up to 10 ZIPs per lookup call.
• Radius up to 25 miles, up to 50 results per call.
• Free, no key, no sign-up. The whole ZIP table lives in memory at the edge, so calls take milliseconds.

Use the API

JSON over HTTPS, CORS enabled, no key. GET for quick calls, POST a JSON body for lists. Spec: openapi.json · llms.txt

curl -s "https://ziplore.cybermax-tools.workers.dev/api/zip?zip=10001%2C+90210%2C+7102"

# lists: POST a JSON body
curl -s -X POST https://ziplore.cybermax-tools.workers.dev/api/zip \
  -H "content-type: application/json" \
  -d '{"zips":["10001","90210","7102"]}'

import requests

r = requests.post("https://ziplore.cybermax-tools.workers.dev/api/zip",
                  json={"zips":["10001","90210","7102"]}, timeout=30)
r.raise_for_status()
for row in r.json()["results"]:
    print(row)

Endpoints: /api/zip look up up to 10 us zip codes · /api/radius every zip within n miles of a zip or point · /api/city every zip of a city, largest first · /api/nearest nearest zip to a point (reverse geocode) · /api/distance distance between two zips

Add it to your AI agent (MCP)

A remote MCP server at https://ziplore.cybermax-tools.workers.dev/mcp (streamable HTTP, no auth). Read-only tools with JSON schemas, so agents know exactly what to send.

// Claude Desktop, Cursor, VS Code, any MCP client (remote, no key)
{
  "mcpServers": {
    "ziplore": { "type": "http", "url": "https://ziplore.cybermax-tools.workers.dev/mcp" }
  }
}

# Claude Code
claude mcp add --transport http ziplore https://ziplore.cybermax-tools.workers.dev/mcp

# Tools: zip_lookup, zips_in_radius, city_zips, nearest_zip, zip_distance
# e.g. zip_lookup({"zips":["10001","90210"]})

• zip_lookup
  City, state, county and FIPS, coordinates, time zone with UTC offset, and Census demographics (population, income, home value, rent) for up to 10 US ZIP codes. Accepts ZIP+4, addresses and ZIPs missing a leading zero.
• zips_in_radius
  Every US ZIP within N miles (max 25) of a ZIP or a lat/lon point, closest first, with distance in miles.
• city_zips
  All ZIP codes of a US city, largest population first.
• nearest_zip
  Reverse geocode a latitude/longitude to the nearest US ZIP code(s), with distance.
• zip_distance
  Great-circle distance in miles and km between two US ZIP codes.

FAQ