Range Netherlands

Beta

Return Dutch postal codes within range of a given postal code.

GEThttps://api.pro6pp.nl/v2/range/nl

Overview

Returns the postal codes within a range of a postal code or settlement.

  • postalCode or settlement is required. When both are supplied, postalCode is used.
  • An ambiguous settlement returns HTTP 400.

ParametersQuery string

authKeystringRequired

Every request needs an API key, which you can get in the portal.

When you call the API from a browser, visitors can see your API key. Limit it to your own domains in the portal, or send the requests through your own server so the key stays hidden.

postalCodestring

Either the fourpp (e.g: 1000) or the sixpp (e.g: 1000AA) notation.

Example
1012
Pattern
^"?([0-9]{4})"?$|^"?([0-9]{4} ?[a-zA-Z]{2})"?$
settlementstring

The address's settlement (city, town, village, or hamlet).

Example
Amsterdam
municipalitystring

The address's municipality (only needed when there are multiple settlements by the same name to differentiate).

Example
Amsterdam
provincestring

The address's province (only needed when there are multiple settlements having the same municipality name, so there's a province needed to differentiate).

Example
Noord-Holland
searchRangeinteger

The range to search, in meters. Maximum 100000.

Example
10000
Default
5000
Min
1
Max
100000
precisionstring

The precision for the returned results. Either sixpp or fourpp.

Default
"fourpp"
One of
fourppsixpp
maxResultsinteger

The amount of results returned, a number between 1 and 999. Default value is 10.

Default
10
Min
1
Max
999
includeInitialPostalCodeboolean

Option whether to include the initial postal code in /v2/range calls. If the value is True, then the initial postal code is included in the search.

Default
false

Responses

200Postcodes within range, or an empty array when nothing matchesList of results
FieldTypeExample valueDescription
postalCodestring"1000"

The 4-digit postal code, or with precision sixpp the six-position postal code without a space, such as "1012AB".

distanceinteger223

Straight-line distance in metres from the requested postal code or settlement, rounded to whole metres.

latnumber52.375

Representative latitude of the postal code. For a 4-digit (fourpp) postal code that spans several settlements, this is the representative point of the dominant settlement (the one with the most addresses).

lngnumber4.899

Representative longitude of the postal code. For a 4-digit (fourpp) postal code that spans several settlements, this is the representative point of the dominant settlement (the one with the most addresses).

Example response
[
  {
    "postalCode": "1000",
    "distance": 223,
    "lat": 52.375,
    "lng": 4.899
  },
  {
    "postalCode": "1001",
    "distance": 223,
    "lat": 52.375,
    "lng": 4.899
  },
  {
    "postalCode": "1002",
    "distance": 223,
    "lat": 52.375,
    "lng": 4.899
  },
  {
    "postalCode": "1003",
    "distance": 223,
    "lat": 52.375,
    "lng": 4.899
  },
  {
    "postalCode": "1005",
    "distance": 223,
    "lat": 52.375,
    "lng": 4.899
  },
  {
    "postalCode": "1006",
    "distance": 223,
    "lat": 52.375,
    "lng": 4.899
  },
  {
    "postalCode": "1007",
    "distance": 223,
    "lat": 52.375,
    "lng": 4.899
  },
  {
    "postalCode": "1008",
    "distance": 223,
    "lat": 52.375,
    "lng": 4.899
  },
  {
    "postalCode": "1009",
    "distance": 223,
    "lat": 52.375,
    "lng": 4.899
  },
  {
    "postalCode": "1014",
    "distance": 223,
    "lat": 52.375,
    "lng": 4.899
  }
]

Errors

Fields of an error response
FieldTypeDescription
error_idstring

The reason the request failed, such as INVALID_VALUE. The response lists the reasons this operation returns.

errorsarray of object

One entry per problem found in the request.

errors[].messagestring

A readable explanation of the problem, in English.

errors[].helpstring

A link to the documentation section that covers the problem.

errors[].parameterany

The parameter the problem is about. Usually its name; a list when several parameters are involved, or a name with the values to choose from when the request must select one.

errors[].valueany

The value the request sent for parameter, when it has one.

400Bad request
MISSING_PARAMETER

Neither postalCode nor settlement is supplied.

MISSING_PARAMETER
{
  "error_id": "MISSING_PARAMETER",
  "errors": [
    {
      "message": "Required parameter postalCode is missing",
      "help": "https://pro6pp.nl/docs/v2/redoc#operation/public_api.v2_generic.range.router.nl",
      "parameter": "postalCode"
    },
    {
      "message": "Required parameter settlement is missing",
      "help": "https://pro6pp.nl/docs/v2/redoc#operation/public_api.v2_generic.range.router.nl",
      "parameter": "settlement"
    }
  ]
}
INVALID_PARAMETER_TYPE

A value has the wrong type, such as a non-integer searchRange.

INVALID_PARAMETER_TYPE
{
  "error_id": "INVALID_PARAMETER_TYPE",
  "errors": [
    {
      "message": "parameter: searchRange has invalid 5km, should be integer",
      "help": "https://pro6pp.nl/docs/v2/redoc#operation/public_api.v2_generic.range.router.nl",
      "parameter": "searchRange"
    }
  ]
}
INVALID_VALUE

A value is malformed or out of bounds, or the postalCode or settlement origin cannot be found.

INVALID_VALUE
{
  "error_id": "INVALID_VALUE",
  "errors": [
    {
      "message": "value is invalid",
      "help": "https://pro6pp.nl/docs/v2/redoc#operation/public_api.v2_generic.range.router.nl",
      "parameter": "postalCode",
      "value": "invalid"
    }
  ]
}
MULTIPLE_RESULTS_FOUND

The settlement is ambiguous; narrow it with municipality or province.

MULTIPLE_RESULTS_FOUND
{
  "error_id": "MULTIPLE_RESULTS_FOUND",
  "errors": [
    {
      "message": "Multiple results found",
      "help": "https://pro6pp.nl/docs/v2/redoc#operation/public_api.v2_generic.range.router.nl"
    }
  ]
}
401Unauthorized
UNAUTHORIZED

The API key is missing, unknown, revoked or expired, its subscription is not active, the request does not match the key's allowlist, or the subscription does not include this call.

UNAUTHORIZED
{
  "error_id": "UNAUTHORIZED",
  "errors": [
    {
      "message": "No authorization token provided",
      "help": "https://pro6pp.nl/docs/v2/redoc#section/Authentication"
    }
  ]
}

Code examples

curl "https://api.pro6pp.nl/v2/range/nl?postalCode=1012&settlement=Amsterdam&municipality=Amsterdam&province=Noord-Holland&searchRange=10000&authKey=YOUR_API_KEY"

We encourage you to request example code in the language you prefer.

Step by step

Set up a quick form to try out the Netherlands Range functionality by following the steps below.

  1. Build the HTML page

    We start by creating an empty HTML page, containing a minimal web page structure. Create a new .html file named pro6pp_netherlands_range.html. Add the following code between the <body> and </body> tags. It adds the input fields for entering the address.

    pro6pp_netherlands_range.html
    <form class="form" id="form">
      <div>Call</div>
      <div>
        <label for="postalCode">postalCode:</label>
        <input id="postalCode" class="postalCode" placeholder="1012"/>
        <label for="settlement">settlement:</label>
        <input id="settlement" class="settlement" placeholder="Amsterdam"/>
        <label for="municipality">municipality:</label>
        <input id="municipality" class="municipality" placeholder="Amsterdam"/>
        <label for="province">province:</label>
        <input id="province" class="province" placeholder="Noord-Holland"/>
        <label for="searchRange">searchRange:</label>
        <input id="searchRange" class="searchRange" placeholder="10000"/>
        <label for="precision">precision:</label>
        <input id="precision" class="precision" placeholder=""/>
        <label for="maxResults">maxResults:</label>
        <input id="maxResults" class="maxResults" placeholder=""/>
        <label for="includeInitialPostalCode">includeInitialPostalCode:</label>
        <input id="includeInitialPostalCode" class="includeInitialPostalCode" placeholder=""/>
      </div>
      <div>
        <span style="color: red" class="message"></span>
      </div>
      <div>
        <button type="submit">Submit</button>
      </div>
      <br />
      <div>Response</div>
      <br />
      <div>Full Response</div>
      <pre class="jsonResponse"></pre>
    </form>
  2. Add interaction

    Add the following JavaScript code in a separate pro6pp_netherlands_range.js file. The IDs and Class names of the HTML elements should match with the ones specified in this JavaScript file in order to get the correct results.

    pro6pp_netherlands_range.js
    document.addEventListener("DOMContentLoaded", function() {
        const pro6ppAuthKey = "AUTH_KEY"; // Replace with your actual authorization key
    
        let messageSpan = document.querySelector(".message");
        let jsonResponseSpan = document.querySelector(".jsonResponse");
        const BASE_URL = "https://api.pro6pp.nl/v2";
    
        function fetchAddress(authKey) {
            const queryParams = {
                authKey: authKey
            };
            const optionalQueryParams = [
                "postalCode",
                "settlement",
                "municipality",
                "province",
                "searchRange",
                "precision",
                "maxResults",
                "includeInitialPostalCode",
            ];
            for (const name of optionalQueryParams) {
                const value = document.getElementById(name).value;
                if (value !== "") {
                    queryParams[name] = value;
                }
            }
    
            let encodedUrl = new URL(`${BASE_URL}/range/nl`);
            encodedUrl.search = new URLSearchParams(queryParams);
    
            fetch(encodedUrl)
                .then(async (response) => {
                    const data = await response.json();
                    if (data) {
                        messageSpan.textContent = "";
                        jsonResponseSpan.textContent = JSON.stringify(data, null, 2);
                    }
                })
                .catch((error) => {
                    console.error("Error fetching: ", error);
                    messageSpan.textContent = error.message;
                });
        }
    
        const form = document.getElementById("form");
        form.onsubmit = function (event) {
            event.preventDefault();
            fetchAddress(pro6ppAuthKey);
        }
    });
  3. Make it work

    Link the JavaScript file inside the pro6pp_netherlands_range.html right before closing the </body> tag.

    pro6pp_netherlands_range.html
      ...
      <script src="pro6pp_netherlands_range.js"></script>
     </body>
    </html>

    To access the Pro6PP web service, you need to request your personal authorization key. This key is emailed to you right after signing up. Replace the above placeholder AUTH_KEY with your personal authorization key.

    If you don’t have an account yet, sign up for a free 2-month trial. After creating your account, go to your Subscription details and copy your AUTH_KEY. You’ll need this key to authenticate your requests.

  4. See it in action

    Once you’ve completed the previous steps, it’s time to run the form locally in your browser. You should now have two files in the same folder on your computer:

    • pro6pp_netherlands_range.html - the HTML page with the form.
    • pro6pp_netherlands_range.js - the JavaScript file that handles the interaction.

    You can now open the HTML file in your browser by simply double-clicking it in your file explorer (e.g., Finder on macOS or File Explorer on Windows). Alternatively, you can open it manually in the browser using the full file:/// path. For example:

    Example file paths
    file:///C:/Users/YourName/Documents/pro6pp_netherlands_range.html
    file:///Users/yourname/Desktop/pro6pp_netherlands_range.html

    Once the page opens, start typing in the form fields and hit Submit to see the API response displayed in the “Full Response” section.