Changing Windows XP Time (SNTP) Servers

Windows XP allows you to select your preferred time server from a list found on the Internet Time tab in the Time and Date program. Although this list includes a number of servers, it’s also possible to configure XP to use a time server a little closer to home by editing the Registry. A list of SNTP servers in located in the Registry under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Current Version\DateTime\Servers.

You can add additional servers to this list by creating additional values of type REG_SZ, using the next available number on the list. Once added, this time servers will be available for selection on the Internet Time tab. For a list of public SNTP servers in the UK and elsewhere, see As a general rule, only second-level time servers allow public access.

Author: Dan DiNicolo

Dan DiNicolo is a freelance author, consultant, trainer, and the managing editor of He is the author of the CCNA Study Guide found on this site, as well as many books including the PC Magazine titles Windows XP Security Solutions and Windows Vista Security Solutions. Click here to contact Dan.