# ZIP/邮政编码

要使用邮政编码连接到代理，请添加并指定 `postalcode` 参数，使用 **五位数** 用户名前的 ZIP code。此参数必须与国家代码参数 `cc` 以及一个不区分大小写的 2 位国家代码结合使用 [**3166-1 alpha-2 格式**](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2). 

用户名示例如下：\
`customer-USERNAME-cc-US-postalcode-90210`

{% hint style="info" %}
目前我们仅支持基于美国的代码进行 ZIP code 定位。 
{% endhint %}

{% hint style="info" %}
使用 ZIP code 的代理位置通过以下方式进行匹配： [**MaxMind IP 地理定位**](https://www.maxmind.com/en/geoip-demo) 数据库。在将 IP 地址与其他 IP 地理定位数据库进行检查时，ZIP code 之间可能会存在不匹配。
{% endhint %}

#### 代码示例

在此示例中，对 `ip.oxylabs.io/location` 是从位于美国、ZIP code 为 `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'
密码 = '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;

类 Example
{
    静态 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/cn/dai-li/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.