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://yonseiportal.ac.kr server time check history

  • 2021-02-10 12:19:16 KST 1.089121
  • 2020-09-03 07:57:18 KST 0.417699
  • 2020-08-25 08:58:52 KST 0.595915
  • 2020-08-13 08:56:43 KST 0.243231
  • 2020-08-13 08:55:38 KST 0.212741
  • 2020-08-13 08:41:31 KST 0.209669
  • 2020-08-13 08:31:45 KST 0.152310
  • 2020-08-10 08:01:10 KST 0.522431
  • 2020-06-10 23:36:54 KST 3.009460
  • 2020-06-10 22:59:02 KST 2.881347
  • Average 0.9333924

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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.