# Código postal

Para conectarte a un proxy usando un código ZIP, añade y especifica el `postalcode` parámetro con un **de cinco dígitos** Código postal en el nombre de usuario. Este parámetro debe usarse combinado con el parámetro de código de país `cc` y un código de país de 2 letras no sensible a mayúsculas/minúsculas [**3166-1 alpha-2**](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2). 

Aquí hay un ejemplo del nombre de usuario:\
`customer-USERNAME-cc-US-postalcode-90210`

{% hint style="info" %}
Actualmente solo admitimos códigos de EE. UU. para la segmentación por código postal. 
{% endhint %}

{% hint style="info" %}
La ubicación del proxy usando código postal se empareja usando [**MaxMind IP Geolocation**](https://www.maxmind.com/en/geoip-demo) base de datos. Puede haber una discrepancia entre códigos postales al comprobar direcciones IP frente a otras bases de datos de geolocalización IP.
{% endhint %}

#### Ejemplos de código

En este ejemplo, se realiza una consulta a `ip.oxylabs.io/location` se realiza desde un proxy ubicado en Estados Unidos con un código postal `90210`:

{% tabs %}
{% tab title="cURL" %}

```shell
curl -x pr.oxylabs.io:7777 -U "customer-USERNAME-cc-US-postalcode-90210:PASSWORD" https://ip.oxylabs.io/location
```

{% endtab %}

{% tab title="PHP" %}

```php
<?php
$username = 'USERNAME';
$password = 'PASSWORD';
$country = 'US';
$postalcode = '90210';
$proxy = 'pr.oxylabs.io:7777';
$query = curl_init('https://ip.oxylabs.io/location');
curl_setopt($query, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($query, CURLOPT_PROXY, "http://$proxy");
curl_setopt($query, CURLOPT_PROXYUSERPWD, "customer-$username-cc-$country-postalcode-$postalcode:$password");
$output = curl_exec($query);
curl_close($query);
if ($output)
    echo $output;
?>
```

{% endtab %}

{% tab title="Python" %}

```python
import urllib.request
import random
username = 'USERNAME'
password = 'PASSWORD'
country = 'US'
postalcode = '90210'
entry = ('http://customer-%s-cc-%s-postalcode-%s:%s@pr.oxylabs.io:7777' %
    (username, country, postalcode, password))
query = urllib.request.ProxyHandler({
    'http': entry,
    'https': entry,
})
execute = urllib.request.build_opener(query)
print(execute.open('https://ip.oxylabs.io/location').read())
```

{% endtab %}

{% tab title="Java" %}

```java
package example;

import org.apache.http.HttpHost;
import org.apache.http.client.fluent.*;

public class Example {
    public static void main(String[] args) throws Exception {
        HttpHost entry = new HttpHost("pr.oxylabs.io", 7777);
        String query = Executor.newInstance()
            .auth(entry, "customer-USERNAME-cc-US-postalcode-90210", "PASS")
            .execute(Request.Get("https://ip.oxylabs.io/location").viaProxy(entry))
            .returnContent().asString();
        System.out.println(query);
    }
}
```

{% endtab %}

{% tab title="C#" %}

```csharp
using System;
using System.Net;

class Example
{
    static void Main()
    {
        var client = new WebClient();
        client.Proxy = new WebProxy("pr.oxylabs.io:7777");
        client.Proxy.Credentials = new NetworkCredential("customer-USERNAME-cc-US-postalcode-90210", "PASSWORD");
        Console.WriteLine(client.DownloadString("https://ip.oxylabs.io/location"));
    }
}
```

{% endtab %}

{% tab title="Ruby" %}

```ruby
require 'uri'
require 'net/http'

uri = URI.parse('https://ip.oxylabs.io/location')
proxy = Net::HTTP::Proxy('pr.oxylabs.io', 7777, 'customer-USERNAME-cc-US-postalcode-90210', 'PASSWORD')

req = Net::HTTP::Get.new(uri.path)

result = proxy.start(uri.host,uri.port) do |http|
    http.request(req)
end

puts result.body
```

{% endtab %}
{% endtabs %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://developers.oxylabs.io/products/es/proxies/residential-proxies/location-settings/zip-postal-code.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.