FIEurope · Northern Europe

Finland Address Validation API

Validate and standardise Finland addresses in real time. Get a matched address, geocoordinates, confidence score, and Postinumero data via a single API call.

NNNNN
Postinumero
OpenStreetMap
Data Source
Finnish / Swedish
Languages
HIGH
Max Confidence

Finland Address Validation Demo

Confidence:HIGH
POST /enrich — ResponseSample
{
  "_note": "Sample response — enter any address and click Validate for live data",
  "valid": true,
  "canonical_address": "Mannerheimintie 1, 00100 Helsinki",
  "confidence": "HIGH",
  "delivery_risk": "low",
  "matched_address": {
    "line1": "Mannerheimintie 1",
    "city": "Mannerheimintie",
    "postal_code": "00100 Helsinki",
    "country": "Finland",
    "iso2": "FI"
  },
  "geocode": {
    "lat": 60.1699,
    "lng": 24.9384
  },
  "data_source": "OpenStreetMap",
  "issues": []
}

Finland Address Format

Finnish addresses include street name + house number + optional apartment letter/number, then 5-digit postal code and city. Bilingual signs appear in Finnish and Swedish in coastal areas. Helsinki city centre uses 00100–00990.

Postal Code Name
Postinumero
Format
NNNNN
Official Languages
Finnish, Swedish
Sample address:
Mannerheimintie 1, 00100 Helsinki
Major cities:
HelsinkiEspooTampereVantaaTurkuOuluLahti

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": "Mannerheimintie 1, 00100 Helsinki"}'

Frequently Asked Questions

What address format does Finland use?
Finnish addresses include street name + house number + optional apartment letter/number, then 5-digit postal code and city. Bilingual signs appear in Finnish and Swedish in coastal areas. Helsinki city centre uses 00100–00990.
What is a Postinumero in Finland?
Finland uses a Postinumero with the format NNNNN to identify delivery areas. The APITier Address Agent API validates and standardises addresses including the Postinumero as part of the response.
How do I validate a Finland 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 Finland address, geocoordinates (lat/lng), a confidence score (HIGH/MEDIUM/LOW), and data source information.

More Europe Countries

Ready to validate Finland addresses at scale?

The APITier Address Agent API handles address validation across 120+ countries. Free trial — 20 requests, no credit card required.