Hulu Error Code 21 [9 Quick Fixes]

Learn how to fix the error code 21 on Hulu by implementing these 9 troubleshooting methods.

Hulu error code 21 displays the message “Error: 21 – ERR_NETWORK_CHANGED” on the screen, which typically translates to an error because of a change in network settings. The error occurs when your network carrier experiences a shift or you change your network connection, and Hulu servers are unable to access it.

Key Takeaways

  • Error code 21 is a network-related issue on Hulu.
  • It happens when there is a change in your network carrier.
  • You can fix it by restarting your router or resetting TCP/IP.

Causes Of Hulu Error Code 21

The primary triggers of Hulu Error Code 21 error are:

  • Faulty Wi-Fi setup
  • Incorrect network connection settings
  • An active VPN
  • Enabled proxy servers
  • Malware or any other virus on your device

How To Fix Hulu Error Code 21

You can fix this error easily by implementing these fixes in order:

  1. Restart Your Internet Router
  2. Restart Your Device
  3. Reset TCP/IP Settings
  4. Flush DNS Servers
  5. Disable VPN
  6. Update Network Drivers
  7. Perform A Virus Scan
  8. Reinstall Hulu
  9. Contact Hulu Support

Restart Your Internet Router

Restarting your internet router or modem gives the device a fresh start and removes any bugs that are causing the error. Give your router a restart and check Hulu to see whether or not the error has been fixed.

Restart Your Device

When troubleshooting such errors, it would be best if you restart your device. Sometimes, a glitch in the device prevents Hulu from streaming and displaying error codes. So, I would recommend restarting the device to resolve error 21.

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Reset TCP/IP Settings

As per my testing, resetting TCP/IP is a helpful solution since it resolves any network-related issues.


Follow these steps to do it on a Windows PC:

  1. To access the Command Prompt, type “cmd” in the search bar located on the taskbar.
  2. When the Command prompt window appears, type “netsh int ip reset” and press “Enter.”
    tcp ip
    Type this in cmd – Image Credits (Emopulse)
  3. Wait for a few minutes and then go to “Power” > “Restart.”


To reset TCP/IP on a Mac, follow these steps:

  1. Navigate to “System Preferences” by clicking on the Apple icon.
  2. Click on “Network” and choose the network name you are using for internet connection.
  3. Now, select “Advanced.”
    network macos
    Advanced – Image Credits (Emopulse)
  4. Click on the TCP/IP tab and select “Renew DHCP Lease.”
  5. To confirm settings, choose “OK.”

Flush DNS Servers

This troubleshooting method will give your network connection a reset.


To flush DNS on Windows, do this process:

  1. Go to Command Prompt by typing “cmd” in the search bar and clicking on “Run as administrator.”
    command prompt
    Run as administrator – Image Credits (Emopulse)
  2. Type the following commands in order, but remember to press Enter after each of them:
  • ipconfig /flushdns
  • ipconfig /registerdns
  • ipconfig /release
  • ipconfig /renew
  • netsh winsock reset


Use the following method to flush DNS on your Mac:

  1. Launch “Terminal.”
    macos terminal
    Terminal – Image Credits (Emopulse)
  2. Type “sudo killall -HUP mDNSResponder” and click on “Enter.”
  3. Enter the admin’s credentials and restart your device.

Disable VPN & Proxy

Using third-party apps like VPN or proxies can mess with your network connection, resulting in errors on Hulu. So, it would be best to disable the VPN or proxy you are using to ensure a smooth streaming experience on Hulu.

Update Network Drivers

Updating the network drivers is a crucial step to resolving error 21 on Hulu since drivers are essential for communication between hardware and software. It might be possible that the network drivers are outdated, resulting in errors.


Here’s how you can update the network drivers on a Windows PC:

  1. Go to “Device Manager.”
    device manager
    Device Manager – Image Credits (Emopulse)
  2. Search “Network adapters” and right-click on it.
  3. Then, select “Update Driver Software.”
  4. Click on “Search automatically for drivers” and do as per the on-screen instructions.
    network drivers
    Search automatically for drivers – Image Credits (Emopulse)
  5. When the update process has been completed, restart your PC to check if the error has vanished or not.


Here is the process for updating network drivers on a macOS device:

  1. Select the Apple logo and click on “System Preferences.”
  2. Choose “Network.”
  3. Now, click on your network connection and select “” to remove connection settings.
    Click on this – Image Credits (Emopulse)
  4. Select “Apply” and restart the device.
  5. After the device has been restarted, navigate again to “System Preferemces.”
  6. Choose “+” and click on “Ethernet.”
  7. Click on “Apply” to save new settings and restart the device.

Perform A Virus Scan

A virus or malware can disrupt your network settings, leading to errors like this. You should always perform a virus scan on your device and check the firewall settings. If there is any malicious software running on your device, it will be displayed on the screen so you can quickly remove it.

Reinstall Hulu

As Reddit users claimed, deleting and reinstalling the Hulu application has helped them fix error code 21. It gives the application a new start, deleting all app cache, any bugs or glitches, and saved data.

Contact Hulu Support

When all else fails, you should head to the Hulu website to contact their support team. You can also contact them via their number at (310) 496-0582. Tell them in detail about your error and the troubleshooting methods you have implemented to resolve it. They will aid you in fixing the error by providing additional fixes.

contact support
Customer Support – Image Credits (Emopulse)

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Frequently Asked Questions

How do I get rid of error 21?

You can get rid of error 21 on Hulu by restarting router, the device you are using or disabling VPN.

Why does Hulu think I'm using a VPN?

Hulu detects VPN use because VPNs hide your real IP, making it seem like you're in a different location. This can bypass Hulu's regional content restrictions, leading them to block VPN access.

Why do I keep getting an error code on Hulu?

Getting an error code on Hulu can occur due to various reasons such as technical issues, connectivity problems, account or subscription issues, or even regional restrictions. Common steps to troubleshoot include checking your internet connection, ensuring Hulu's servers are operational, clearing cache/cookies, updating the Hulu app, and verifying your account status. If the issue persists, referring to Hulu's official support or contacting their customer service can provide tailored assistance for the specific error code you're encountering.

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