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://yeyak.seosan.go.kr/popup/index/SEOSAN/POPUP/30/0 server time check history

  • 2020-02-21 16:03:10 KST -1.067804
  • 2020-02-21 08:57:59 KST -0.989048
  • 2020-02-15 20:55:42 KST -1.807359
  • 2020-02-14 22:52:02 KST -1.667180
  • 2020-02-14 22:13:01 KST -1.628352
  • 2020-02-14 22:11:31 KST -1.649738
  • Average -1.4682468333333

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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.