DNS_ERROR_CNAME_LOOP 0x800725EB

Error code 9707 · HRESULT 0x800725EB

WINDOWS

CNAME loop detected.

Windows troubleshooting diagram: Device Manager warning and a system file scan
Windows errors: check drivers, system files and Event Viewer, in that order.

What it means

DNS_ERROR_CNAME_LOOP is a Windows error code (system error 9707, returned as HRESULT 0x800725EB) reported by Windows. Its official message is: “CNAME loop detected.”

How to fix DNS_ERROR_CNAME_LOOP

  1. Test connectivity to the remote host first (ping, then the exact port)
  2. Check firewall, VPN and proxy rules for the involved process
  3. Run 'ipconfig /flushdns' and 'netsh interface ip reset', then reboot

Related errors

DNS_ERROR_CNAME_COLLISIONDNS_ERROR_NAME_NOT_IN_ZONEDNS_ERROR_NODE_IS_CNAMEDNS_ERROR_RECORD_TIMED_OUTDNS_ERROR_UNKNOWN_RECORD_TYPEDNS_ERROR_RECORD_ONLY_AT_ZONE_ROOTDNS_ERROR_NODE_CREATION_FAILED

Source: Microsoft WinError.h

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