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Home/ Blog/ How to determine if a proxy is blocked by proxy checker?

How to determine if a proxy is blocked by proxy checker?

PYPROXY PYPROXY · Jun 25, 2025

When working with proxies, one of the major concerns is ensuring that the proxy you are using is not blocked. This is especially crucial when dealing with sensitive tasks such as web scraping, anonymous browsing, or managing multiple accounts. A proxy that is blocked will fail to connect to target websites, potentially disrupting your operations. One effective way to determine if a proxy is blocked is by using a proxy checker.

What is a Proxy Checker?

A proxy checker is a tool or software designed to test the functionality of a proxy server by evaluating its status and verifying whether it is being blocked or restricted by websites. Proxy checkers are essential for users who rely on proxies for privacy, security, or data collection purposes. By using a proxy checker, you can analyze the proxy’s response time, check if it's operational, and determine whether any restrictions have been placed on it.

Steps to Check if a Proxy is Blocked

Step 1: Conducting Basic Connectivity Tests

The first step in checking if a proxy is blocked is to perform basic connectivity tests. This involves attempting to connect to a website using the proxy. If the connection fails repeatedly, it may indicate that the proxy is blocked. A proxy checker will allow you to check the response times and whether the proxy can successfully establish a connection.

Step 2: Check the IP Address and Response Code

Another important test is to check the proxy’s IP address. Some proxy checkers will display the response code returned by the server when attempting to access a website through the proxy. For instance, an HTTP response code such as 403 or 503 often indicates that the proxy has been blocked or blacklisted. These codes suggest that the server has identified the proxy's IP address as suspicious or abusive and has restricted its access.

Step 3: Use Geo-Location Verification

Proxies can be geo-restricted based on their geographical location. A proxy checker can also verify the geolocation of the proxy ip. If the geo-location results do not match the expected location of the proxy, it could mean that the proxy is being blocked or filtered by geographic location restrictions. For example, if you're using a proxy from the U.S. and the checker shows it’s originating from a different country, the proxy might be blocked.

Step 4: Test Different Websites

Some proxies might work with certain websites but not with others. This is because some websites employ specific filtering or blocking mechanisms against proxies. A proxy checker that allows you to test multiple websites can help determine if the proxy is universally blocked or if the issue is specific to certain sites.

Step 5: Analyze Speed and Latency

Another indicator of a blocked or poor-performing proxy is increased latency or slow response times. If the proxy checker shows abnormally high latency or slow load times, it could be a sign that the proxy is either blocked or facing issues due to heavy traffic or poor server performance. High latency can be caused by throttling, which happens when proxies are detected and intentionally slowed down to discourage usage.

Advanced Techniques to Verify Blocked Proxies

Step 6: Use CAPTCHA Challenges

One of the most common ways websites block proxies is by serving CAPTCHA challenges to the proxy’s IP address. These CAPTCHAs are designed to distinguish human users from automated traffic. If a proxy is frequently asked to complete CAPTCHAs when attempting to access websites, this is a clear sign that the proxy has been flagged or blocked. Proxy checkers equipped with CAPTCHA bypass techniques can help you determine the severity of the block.

Step 7: Check for DNS Resolution Issues

Sometimes, proxies are blocked at the DNS level. This means that the proxy’s IP address is being blacklisted by the Domain Name System (DNS), preventing access to any websites hosted under specific DNS servers. A proxy checker can identify DNS resolution issues and show if the proxy’s IP address is unable to resolve hostnames properly.

Step 8: Use Multiple Proxy Checkers for Cross-Verification

For more reliable results, it's beneficial to use multiple proxy checkers. Different proxy checkers may use varying methods to detect proxy issues, and cross-verifying the results can give you a clearer picture of the proxy’s status. This helps in ensuring accuracy when diagnosing blocked proxies.

What to Do If Your Proxy is Blocked?

If you discover that your proxy is blocked, there are several actions you can take. First, try changing the proxy's IP address. Some proxy services allow you to rotate IP addresses, which can help bypass restrictions. Additionally, you can consider using a different proxy type, such as residential proxies, which are harder to detect and block compared to datacenter proxies.

Conclusion: The Importance of Regular Proxy Checking

In conclusion, regular use of a proxy checker is crucial for maintaining the effectiveness of proxies in a variety of tasks, such as data scraping, anonymous browsing, and web automation. By checking if your proxy is blocked using a reliable proxy checker, you can save time, avoid interruptions, and ensure that your activities remain uninterrupted. Regular monitoring allows you to troubleshoot issues early and adjust your proxy strategy accordingly. Remember, proxies can get blocked for several reasons, and it’s essential to stay vigilant to maintain a seamless experience.

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