These values all have the bits 0x0300 in common.
| HRESULT Value (Hex) | Status Code Name | Description |
| 0x80040300 | NET_E_GENERAL | A network I/O operation failed. |
| 0x80040301 | NET_E_UNEXPECTED | An unexpected network failure occurred. |
| 0x80040302 | NET_E_RESOURCES | Operation failure: Not enough network resources to complete the operation. |
| 0x80040303 | NET_E_DISCONNECTED | The network connection has been lost. |
| 0x80040304 | NET_E_BADSEQUENCE | Internal error: Operation sequence is not valid. |
| 0x80040305 | NET_E_NETDOWN | The network subsystem failed. |
| 0x80040306 | NET_E_WINSOCKNOTINITIALIZED | Internal error: The Windows socket service is not initialized. |
| 0x80040307 | NET_E_ADDRINUSE | Unable to initialize Search server. TCP/IP port is already in use. |
| 0x80040308 | NET_E_INVALIDPARAMS | Internal error: The parameters passed were not valid. |
| 0x80040309 | NET_E_OPERATIONINPROGRESS | Internal error: Another operation is already in progress on this socket. |
| 0x8004030a | NET_E_HOSTNOTFOUND | Unable to find the specified host. |
| 0x8004030b | NET_E_HOSTLOOKUPFAILED | Host lookup failed. |
| 0x8004030c | NET_E_CONNABORTED | The network connection timed out or halted because of other errors. |
| 0x8004030d | NET_S_MOREDATA | The current message contains additional data. |
| 0x8004030e | NET_E_CONNREFUSED | The remote machine refused the connection. |
| 0x8004030f | NET_E_TIMEOUT | The network operation timed out. |