# Why residential proxies are not saved

{% hint style="info" %}
This is normal behavior. Residential proxies are dynamic, and storing generated sessions in the Proxy List simply makes no sense.
{% endhint %}

## Why it works this way

Residential proxies differ from [Datacenter ](https://docs.proxyshard.com/eng/our-products/datacenter-proxies)and [ISP](https://docs.proxyshard.com/eng/about-proxyshard#isp-proksi) in that the proxy IP addresses are hosted on real home devices.

Each time a session is generated, a new session is created with a unique identifier, to which the IP is temporarily tied. Therefore, the list is not saved; it becomes outdated immediately after rotation.

## Old sessions do not disappear, either

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When you generate new proxies with different settings, **the old ones keep working** and do not change their parameters. Each session lives independently of the others.
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### Example

Suppose you generated German proxies:

```
relay-eu.proxyshard.com:8080:plan-limited-country-de-sid-aaaaaaaaa:xxxxxxxxx
```

Let's break down the connection string:

| Part                      | Value                                                                          |
| ------------------------- | ------------------------------------------------------------------------------ |
| `relay-eu.proxyshard.com` | Load balancer server (relay)                                                   |
| `8080`                    | Server port                                                                    |
| `plan-limited`            | Proxy plan (`limited` - regular, `unlimited` - unlimited, `premium` - premium) |
| `country-de`              | Connection country: Germany (`de`)                                             |
| `sid-aaaaaaaaa`           | Unique session ID to which the IP address is tied                              |
| `xxxxxxxxx`               | Password for connection                                                        |

If after that you generate, for example, American proxies, a new line will appear with `country-us` and a different `sid`. But the German session `sid-aaaaaaaaa` **will not go anywhere** and will continue working with the same IP until the session expires.

{% hint style="warning" %}
If you need a permanent IP, use [Datacenter](https://docs.proxyshard.com/eng/our-products/datacenter-proxies) or [ISP proxies](https://docs.proxyshard.com/eng/our-products/isp-proxies)\
Proxies from these sections have a static IP and are issued exclusively to one user
{% endhint %}