NKO Atomic Clock

Current time in milliseconds unit, dday remaining time calculator, elapsed time, stopwatch, server time checker

☞ Install NKO Atomic Clock(Android app) at Google Playstore
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http://portal.yonsei.ac.kr server time check history

  • 2017-11-20 07:58:17 KST -0.190024
  • 2017-11-09 09:52:15 KST -0.383314
  • 2017-09-05 07:53:22 KST -0.026701
  • 2017-08-28 08:15:56 KST -0.021988
  • 2017-07-29 14:13:35 KST -0.014568
  • 2017-06-26 03:08:06 KST -0.045520
  • 2017-06-20 07:49:52 KST -0.050972
  • 2017-06-07 17:32:34 KST -0.028196
  • 2017-05-18 01:29:55 KST -0.051417
  • 2017-03-06 07:50:47 KST -0.018940
  • Average -0.083164

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We fetch a server clock and let you see

Webservers transmit their time in seconds unit, so without special treatment, the maximum error would be as big as 1 second. NKO Atomic Clock calculates a server time more than ten times in 1 second and seize the moment when the second changes. Thus we can minimize the calculation error as small as 0.1 second. Moreover, delays between our server and a destination server are considered so the accuracy of time increases.

NKO supports the HTTPS protocol and subdomains

Some servers use different servers over protocols or subdomains. You can get a desired result by specifying more details.


# You need to tell us an exact server address. For example, some sites host differently by whether the address begin with WWW or not.

# Even if your computer clock isn't synchronized, NKO always will display correct time.

# If you click a numeric time error in the history view, the clock will use that measurement.

# The results can have quite much error if the destination server is under load balancing. Please refer to a variance in the server time history information.

# A particular service uses its own time clock, different with web servers' clock. in this case, server time guessing is not meaningful.