Use the public ntp.ww.cx service where the operating system supports a custom time server. On iPhone, Pixel, and most other Android devices, enable automatic network time; stock mobile settings do not normally expose a custom NTP hostname.
ntp.ww.cx
Windows built-in W32Time uses standard NTP. NTS is available to compatible clients such as chrony.
Stock iOS and Android settings do not normally provide a supported field for entering a custom NTP hostname such as ntp.ww.cx. Enable automatic time and time-zone detection instead. You can still use the WW.CX live clock to compare the displayed UTC time.
Menu wording can vary slightly by Android release. See Google Pixel Help for model-specific support.
The exact labels vary by manufacturer and Android version.
Not through the normal settings on stock iPhone, Pixel, or most Android devices. Clock apps may compare time, but they generally cannot replace the protected system time source. Managed devices and custom operating systems require administrator- or vendor-specific procedures.
The helper uses Microsoft’s built-in w32tm client-mode configuration. It requests Administrator permission, refuses to replace Active Directory domain time policy, starts W32Time if necessary, saves a rollback copy, configures ntp.ww.cx,0x8, resynchronizes, and performs a five-sample NTP test.
Download the plain-text Windows command helper and double-click it. Windows will ask for Administrator permission because changing the system time source is a privileged operation.
SHA-256:
89006f96cc8482f1fa033528c93338017627bb74ea3a3b6972771d0986eb3cfd
Before changing Windows Time, the helper exports the current W32Time registry tree and query output under:
C:\ProgramData\WWCX-Time\before-YYYYMMDD-HHMMSS\
It does not install a background application, driver, browser extension, or WW.CX service. After setup, Windows itself continues doing the synchronization.
If Windows reports that the computer belongs to an Active Directory domain, the helper stops. Domain-managed machines normally receive time through their domain hierarchy and should be changed by the administrator responsible for that policy.
Run an Administrator Command Prompt. If W32Time is stopped, start it first. Then configure the WW.CX peer and verify the source:
net start W32Time
w32tm /config /manualpeerlist:"ntp.ww.cx,0x8" /syncfromflags:manual /update
net stop W32Time
net start W32Time
w32tm /resync
w32tm /query /source
w32tm /query /status
w32tm /stripchart /computer:ntp.ww.cx /samples:5 /dataonly
The 0x8 flag tells Windows Time to use NTP client mode. Windows W32Time synchronizes over UDP port 123.
Open System Settings → General → Date & Time, turn on automatic date and time, click Set, and enter:
ntp.ww.cxmacOS also provides the systemsetup command:
sudo systemsetup -setnetworktimeserver ntp.ww.cx
sudo systemsetup -setusingnetworktime on
sudo systemsetup -getnetworktimeserver
sudo systemsetup -getusingnetworktimeAdd WW.CX as one source among several independent time sources. The exact configuration file and service restart command depend on your operating system or distribution.
server ntp.ww.cx iburstUses the public WW.CX NTP service over UDP port 123.
server ntp.ww.cx iburst ntsFor chrony builds with NTS support, the nts option authenticates the time source using NTS-KE and TLS.
chronyc sources -vUse your operating system’s normal chrony service controls to reload or restart the daemon after editing its configuration.
For important systems, configure multiple independent time sources rather than depending on WW.CX or any other single public server.
Security note: the downloadable Windows helper is intentionally simple and inspectable. Verify the SHA-256 value above if you want to confirm the downloaded file has not changed. WW.CX does not ask for passwords, account credentials, or private keys.
WW.CX Time is a best-effort public Internet time service. It is not a legal-metrology, navigation, medical, emergency, industrial-safety or other life-safety reference.