Dynamic DNS Update Interval Registry Key Location

This article explains how to locate and configure the system-wide dynamic DNS (DDNS) update interval using the Windows Registry Editor (Regedit). By adjusting this setting, administrators can define how frequently a Windows client automatically refreshes its host name and IP address registrations with the configured DNS servers.

The system-wide dynamic DNS update interval is located in the following registry path:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

To configure the update interval globally across all network adapters, look for or create the following value:

• Value Name: DefaultRegistrationRefreshInterval
• Data Type: REG_DWORD
• Value Data: The interval in seconds (entered in Decimal format)

By default, Windows sets this refresh interval to 86,400 seconds (24 hours). If you wish to decrease or increase the frequency of DDNS updates across the entire system, modify the DefaultRegistrationRefreshInterval value to your preferred time in seconds. For example, setting the value to 14400 in decimal will refresh registrations every 4 hours.

If Group Policy manages DNS registration settings on the machine, the configuration key can instead be found under:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\DNSClient

Within this policy path, the setting is defined by the DWORD value named RegistrationRefreshInterval. Values defined under the Policies hive take precedence over settings in the Tcpip\Parameters key.

After modifying these registry entries, restart the DNS Client service or run the command ipconfig /registerdns in an elevated Command Prompt to apply the changes immediately.