Call of Duty Dev Error 5573: How to Fix It

Medium 20-45 minutes Medium Severity Verified June 2026
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Error Code
Dev Error 5573
Brand
Call of Duty
Product Type
game
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
20-45 minutes
Call of Duty Dev Error 5573 occurs when your game can't connect to matchmaking servers or experiences lobby connection timeouts. This error typically prevents you from joining multiplayer matches and can be frustrating during peak gaming hours.
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Tools You'll Need

How to Fix Error Code Dev Error 5573

  1. Restart the Game and Platform

  2. Check Server Status

  3. Test Your Internet Connection

  4. Reset Network Settings

  5. Change DNS Servers

  6. Disable Firewall and Antivirus Temporarily

    Remember to re-enable your security software after testing to maintain system protection.

  7. Forward Ports for Call of Duty

  8. Use Wired Connection

  9. Update Game and System

  10. Reinstall Network Drivers

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When to Call a Professional

Contact your internet service provider if connection issues persist across all devices and games, or if you're unable to access router settings. Consider professional IT support if network driver issues continue after multiple reinstallation attempts.

Frequently Asked Questions

What causes Call of Duty Dev Error 5573?
Dev Error 5573 is typically caused by network connectivity issues, server problems, firewall blocking, or corrupted game files that prevent proper matchmaking connections.
How long does it take to fix Dev Error 5573?
Most fixes take 20-45 minutes to complete. Simple solutions like restarting the game may work immediately, while network configuration changes might take longer.
Can Dev Error 5573 be fixed without changing router settings?
Yes, many cases can be resolved by restarting the game, checking server status, changing DNS servers, or temporarily disabling security software without router modifications.
Is Dev Error 5573 affecting all Call of Duty games?
This error can occur across different Call of Duty titles including Modern Warfare, Warzone, and Black Ops series when they share similar networking infrastructure.
Should I contact Activision support for Dev Error 5573?
Contact Activision support if the error persists after trying all troubleshooting steps, especially if it coincides with widespread server issues or recent game updates.

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