# ISP Targeting

Source: https://docs.evomi.com/proxy-instructions/residential-proxies/expert-settings/isp/

**Note:** Expert settings are only available for **Core Residential Proxies**.

Evomi Residential Proxies offer premium ISP (Internet Service Provider) targeting for advanced use cases requiring network-specific connections. This enterprise-grade feature enables precise control over the originating network of your proxy IPs.

## Implementation
Append `_isp-<code>` to your proxy password using our standardized ISP codes:

<!--email_off-->
```bash
http://testuser:testpassword_isp-att@rp.evomi.com:1000
```
<!--email_on-->

## Examples

#### CURL

  ```bash
curl -x http://rp.evomi.com:1000 -U testuser:testpassword_isp-comcast https://ip.evomi.com/s

curl -x http://rp.evomi.com:1000 -U testuser:testpassword_country-US_isp-verizon https://ip.evomi.com/s
```

#### Python

  ```Python
import requests

proxy_pass = "testpassword_isp-att"
proxy_url = f"http://testuser:{proxy_pass}@rp.evomi.com:1000"

proxies = {
  "http": proxy_url,
}
response = requests.get("https://ip.evomi.com/s", proxies=proxies)
print(response.text)
```

#### JavaScript

```JavaScript
const fetch = require('node-fetch');

const proxyPass = 'testpassword_isp-dvodafone';
const proxyUrl = `http://testuser:${proxyPass}@rp.evomi.com:1000`;
const url = 'https://ip.evomi.com/s';

fetch(url, { proxy: proxyUrl })
  .then(res => res.text())
  .then(body => console.log(body));
```

## Common Use Cases
- Carrier-specific content delivery testing
- Network infrastructure validation
- ISP-level ad campaign verification
- Telecom compliance checks
- Localized service availability testing

**Code Management**  
Always verify current ISP codes using our [Proxy Generator](https://docs.evomi.com/proxy-instructions/proxy-generator/). Codes follow the format:  
`_isp-{carriercode}` (e.g., `att`, `verizon_wireless`, `telekom_de`)

**Note:** The isp parameter is an extra feature. Using it will incur additional bandwidth consumption. You can see the exact extra usage history in the dashboard and in the Generator.

**Pro Tip**  
Combine with geographic parameters for hyper-targeted routing:  
`country-US_isp-comcast`  
`region-TX_isp-att`  
`city-houston_isp-spectrum`