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://yonsei.portal.ac.kr server time check history

  • 2019-12-03 15:03:35 KST 1.955029
  • 2019-12-03 13:57:54 KST 1.829854
  • 2019-08-26 23:04:17 KST 2.243938
  • 2019-05-14 07:59:02 KST 0.170635
  • 2019-04-18 08:40:06 KST 0.839554
  • 2019-03-07 07:57:08 KST 0.638170
  • 2019-03-07 07:31:26 KST 0.558562
  • 2019-03-07 06:56:05 KST 0.523581
  • 2019-03-07 06:54:13 KST 0.476072
  • 2019-03-07 05:51:11 KST 0.304661
  • Average 0.9540056

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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.