USNorth America · North America

United States Address Validation API

Validate and standardise United States addresses in real time. Get a matched address, geocoordinates, confidence score, and ZIP Code data via a single API call.

NNNNN or NNNNN-NNNN
ZIP Code
OpenStreetMap
Data Source
English
Languages
HIGH
Max Confidence

United States Address Validation Demo

Confidence:HIGH
POST /enrich — ResponseSample
{
  "_note": "Sample response — enter any address and click Validate for live data",
  "valid": true,
  "canonical_address": "1600 Pennsylvania Avenue NW, Washington, DC 20500",
  "confidence": "HIGH",
  "delivery_risk": "low",
  "matched_address": {
    "line1": "1600 Pennsylvania Avenue NW",
    "city": "Washington",
    "postal_code": "DC 20500",
    "country": "United States",
    "iso2": "US"
  },
  "geocode": {
    "lat": 38.8951,
    "lng": -77.0364
  },
  "data_source": "OpenStreetMap",
  "issues": []
}

United States Address Format

US addresses consist of a street number, street name, city, two-letter state abbreviation, and 5-digit ZIP code (optionally extended to ZIP+4 for delivery-point precision). Apartment or suite numbers follow the street address.

Postal Code Name
ZIP Code
Format
NNNNN or NNNNN-NNNN
Official Languages
English
Sample address:
1600 Pennsylvania Avenue NW, Washington, DC 20500
Major cities:
New YorkLos AngelesChicagoHoustonPhoenixPhiladelphiaSan Francisco

Integration Code

curl -X POST https://agent.apitier.com/v1/enrich \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_API_KEY" \
  -d '{"address": "1600 Pennsylvania Avenue NW, Washington, DC 20500"}'

Frequently Asked Questions

What address format does United States use?
US addresses consist of a street number, street name, city, two-letter state abbreviation, and 5-digit ZIP code (optionally extended to ZIP+4 for delivery-point precision). Apartment or suite numbers follow the street address.
What is a ZIP Code in United States?
United States uses a ZIP Code with the format NNNNN or NNNNN-NNNN to identify delivery areas. The APITier Address Agent API validates and standardises addresses including the ZIP Code as part of the response.
How do I validate a United States address via API?
Send a POST request to https://agent.apitier.com/v1/enrich with your address string in the request body and your API key in the x-api-key header. The response includes the standardised United States address, geocoordinates (lat/lng), a confidence score (HIGH/MEDIUM/LOW), and data source information.

More North America Countries

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