How can I query an NTP server under Windows?
C:\> w32tm /stripchart /computer:foo
Tracking foo [1.2.3.4].
The current time is 19/07/2012 17:39:48 (local time).
17:39:48 d:-00.0000840s o:-25.3004160s [@ | ]
17:39:50 d:-00.0000680s o:-25.3070080s [@ | ]
17:39:52 d:-00.0000690s o:-25.2987405s [@ | ]
17:39:54 d:-00.0000680s o:-25.3071530s [@ | ]
17:39:56 d:-00.0000690s o:-25.2993985s [@ | ]
17:39:58 d:-00.0000680s o:-25.3070270s [@ | ]
Wireshark shows NTP packets being generated by this. Some versions of w32tm have a /query option
C:\>w32tm /stripchart /computer:us.pool.ntp.org /dataonly /samples:5
Tracking us.pool.ntp.org [208.87.221.228:123].
Collecting 5 samples.
The current time is 19/07/2012 18:36:32.
18:36:32, +03.3575094s
18:36:34, +03.3573679s
18:36:37, +03.3572986s
18:36:39, +03.3570290s
18:36:41, +03.3565357s
Bytefusion's ntpquery seems to be incredibly old, but works. Sadly, it requires initial installation, but the application files will work fine when copied to another system.
The latest and greatest NTP check tool I could find was this: https://www.galsys.co.uk/categories/ntp-server-checker.html