ERROR_NETWORK_UNREACHABLE - 1231 (0x4CF)
The network location cannot be reached. For information about network troubleshooting, see Windows Help.
Updated: Feb 21, 2026
Introduction
This article provides a detailed technical reference for the ERROR_NETWORK_UNREACHABLE error code. It covers its meaning, context, and developer interpretation.
Technical Meaning
The ERROR_NETWORK_UNREACHABLE error indicates that a network operation failed because the specified network location could not be reached. This can occur due to various reasons such as incorrect network configuration, connectivity issues, or resource limitations.
Error Details
- Error Name: ERROR_NETWORK_UNREACHABLE
- Numeric Code: 1231 (0x4CF)
- Short Description: The network location cannot be reached. For information about network troubleshooting, see Windows Help.
Usage Context
This error is typically encountered in scenarios where a network operation such as file access or service communication fails due to the target network resource being unreachable. It can occur at various levels of the networking stack, from IP-level issues to higher-layer protocol failures.
Developer Interpretation
Developers should interpret this error as an indication that the specified network location is not accessible. This could be due to a variety of factors such as incorrect network settings, firewall rules, or network infrastructure issues. Developers are advised to consult Windows Help for detailed troubleshooting steps and additional resources.
Related Errors
ERROR_NETNAME_DELETED(639)ERROR_NETWORK_ACCESS_DENIED(53)ERROR_HOST_UNREACHABLE(10064)
FAQ
Q: What does the ERROR_NETWORK_UNREACHABLE error indicate?
A: It indicates that a network operation failed because the specified network location could not be reached.
Q: How can I troubleshoot this issue?
A: Refer to Windows Help for detailed troubleshooting steps and additional resources. Common issues include incorrect network settings, firewall rules, or network infrastructure problems.
Summary
The ERROR_NETWORK_UNREACHABLE error is a generic indication that a network operation failed due to the target location being unreachable. Developers should consult Windows documentation for specific guidance on resolving this issue.