Postcodes.io

📸 Real response, captured by us

Not a mockup — this is what Postcodes.io actually returned when we verified it on 23 Oct 2026 (in 1467 ms).

{
  "status": 200,
  "result": {
    "postcode": "SW1A 1AA",
    "quality": 1,
    "eastings": 529090,
    "northings": 179645,
    "country": "England",
    "nhs_ha": "London",
    "longitude": -0.141563,
    "latitude": 51.50101,
    "european_electoral_region": "London",
    "primary_care_trust": "Westminster",
    "region": "London",
    "lsoa": "Westminster 018C",
    "msoa": "Westminster 018",
    "incode": "1AA",
    "outcode": "SW1A",
    "parliamentary_constituency": "Cities of London and Westminster",
    "parliamentary_constituency_2024": "Cities of London and Westminster",
    "senedd_constituency": null,
    "senedd_constituency_no": null,
    "admin_district": "Westminster",

💻 Copy-paste code

Three ways to call Postcodes.io — pick your weapon.

// Postcodes.io — no build step, no library. Just fetch.
const res = await fetch("https://api.postcodes.io/postcodes/SW1A1AA");
const data = await res.json();
console.log(data);

# Postcodes.io with Python requests
import requests

r = requests.get("https://api.postcodes.io/postcodes/SW1A1AA")
print(r.status_code)
print(r.json())

# Postcodes.io from your terminal
curl "https://api.postcodes.io/postcodes/SW1A1AA"

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