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

  • 2018-12-12 13:54:50 KST -0.069227
  • 2018-12-03 09:46:38 KST -0.039257
  • 2018-11-27 13:59:27 KST -0.036060
  • 2018-11-20 07:57:45 KST -0.062359
  • 2018-11-20 07:55:43 KST -0.032345
  • 2018-11-20 07:54:18 KST -0.069469
  • 2018-11-20 07:52:36 KST -0.041154
  • 2018-11-20 07:48:39 KST -0.029584
  • 2018-11-20 07:43:14 KST -0.028579
  • 2018-11-20 07:41:52 KST 0.003481
  • Average -0.0404553

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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.