DNS response history for ns1.sys21.kr

ns1.sys21.kr is a DNS nameserver monitored by NameServerHistory. This page provides historical DNS response-time data, nameserver uptime signals, DNS latency observations, resolved IP history, successful response counts, failed response counts, and reliability indicators for this nameserver.

The selected UTC date is 2026-08-25. For this date, NameServerHistory found 112 DNS check records, 112 successful responses, 0 failed responses, and 637 ms average response time. Current selected-date status: At least one successful DNS response was recorded for the selected date.

  • Use this report to investigate historical DNS uptime and nameserver reliability.
  • Compare DNS latency changes, failed DNS checks, and response behavior over time.
  • Review the latest resolved IP address and raw DNS check history for ns1.sys21.kr.
Records on Selected Date

112

Historical checks stored for this nameserver on selected date

Average Latency

637 ms

Calculated from available response records

Latest Check on Selected Date

2026-08-25 19:24

All timestamps shown in UTC

Latest Resolved IP on Selected Date

192.168.0.7

Most recently resolved hosting IP on selected date

Successful Responses

112

Checks that returned a measurable response

Failed Responses

0

Checks with no response or no returned latency

Failure Rate

0%

Based on the selected date history

Selected Date Status

Responsive

At least one successful response exists on selected date

History for ns1.sys21.kr

Showing DNS history for 2026-08-25 UTC. Newest records appear first.

Latency bars are scaled to a maximum of 5000 ms for quick visual comparison.

# Query Time (UTC) Correlation ID Latency Response IP Address
112 2026-08-25 19:24 639232817798330473
628 ms 192.168.0.7
111 2026-08-25 19:24 639232817798330473
628 ms 192.168.0.5
110 2026-08-25 18:30 639232785462407552
623 ms 192.168.0.7
109 2026-08-25 18:30 639232785462407552
623 ms 192.168.0.5
108 2026-08-25 18:13 639232775177487032
3 ms 192.168.0.7
107 2026-08-25 18:13 639232775177487032
3 ms 192.168.0.5
106 2026-08-25 17:56 639232764991087115
600 ms 192.168.0.7
105 2026-08-25 17:56 639232764991087115
600 ms 192.168.0.5
104 2026-08-25 17:39 639232754842971478
624 ms 192.168.0.7
103 2026-08-25 17:39 639232754842971478
624 ms 192.168.0.5
102 2026-08-25 17:22 639232744455159107
4 ms 192.168.0.5
101 2026-08-25 17:22 639232744455159107
4 ms 192.168.0.7
100 2026-08-25 17:04 639232734145178231
595 ms 192.168.0.5
99 2026-08-25 17:04 639232734145178231
595 ms 192.168.0.7
98 2026-08-25 16:47 639232723827874402
606 ms 192.168.0.7
97 2026-08-25 16:47 639232723827874402
606 ms 192.168.0.5
96 2026-08-25 16:30 639232713533011892
627 ms 192.168.0.5
95 2026-08-25 16:30 639232713533011892
627 ms 192.168.0.7
94 2026-08-25 16:13 639232703065318207
610 ms 192.168.0.7
93 2026-08-25 16:13 639232703065318207
610 ms 192.168.0.5
92 2026-08-25 15:55 639232692629559470
630 ms 192.168.0.5
91 2026-08-25 15:55 639232692629559470
630 ms 192.168.0.7
90 2026-08-25 15:38 639232682238836475
1476 ms 192.168.0.5
89 2026-08-25 15:38 639232682238836475
1476 ms 192.168.0.7
88 2026-08-25 15:20 639232671787004306
625 ms 192.168.0.5
87 2026-08-25 15:20 639232671787004306
625 ms 192.168.0.7
86 2026-08-25 14:26 639232638994329666
1634 ms 192.168.0.7
85 2026-08-25 14:26 639232638994329666
1634 ms 192.168.0.5
84 2026-08-25 14:09 639232628614783237
658 ms 192.168.0.7
83 2026-08-25 14:09 639232628614783237
658 ms 192.168.0.5
82 2026-08-25 13:51 639232618360728578
629 ms 192.168.0.5
81 2026-08-25 13:51 639232618360728578
629 ms 192.168.0.7
80 2026-08-25 13:34 639232608016476376
639 ms 192.168.0.5
79 2026-08-25 13:34 639232608016476376
639 ms 192.168.0.7
78 2026-08-25 13:17 639232597643611557
634 ms 192.168.0.7
77 2026-08-25 13:17 639232597643611557
634 ms 192.168.0.5
76 2026-08-25 13:00 639232587225721862
3 ms 192.168.0.5
75 2026-08-25 13:00 639232587225721862
3 ms 192.168.0.7
74 2026-08-25 12:42 639232576780683689
608 ms 192.168.0.7
73 2026-08-25 12:42 639232576780683689
608 ms 192.168.0.5
72 2026-08-25 12:25 639232566381512620
4 ms 192.168.0.7
71 2026-08-25 12:25 639232566381512620
4 ms 192.168.0.5
70 2026-08-25 12:08 639232556111768563
588 ms 192.168.0.7
69 2026-08-25 12:08 639232556111768563
588 ms 192.168.0.5
68 2026-08-25 11:50 639232545839529039
609 ms 192.168.0.5
67 2026-08-25 11:50 639232545839529039
609 ms 192.168.0.7
66 2026-08-25 11:33 639232535349285207
623 ms 192.168.0.7
65 2026-08-25 11:33 639232535349285207
623 ms 192.168.0.5
64 2026-08-25 11:16 639232524938080723
616 ms 192.168.0.5
63 2026-08-25 11:16 639232524938080723
616 ms 192.168.0.7
62 2026-08-25 10:22 639232492740373468
580 ms 192.168.0.7
61 2026-08-25 10:22 639232492740373468
580 ms 192.168.0.5
60 2026-08-25 10:05 639232482235303141
595 ms 192.168.0.7
59 2026-08-25 10:05 639232482235303141
595 ms 192.168.0.5
58 2026-08-25 09:47 639232471861770303
619 ms 192.168.0.5
57 2026-08-25 09:47 639232471861770303
619 ms 192.168.0.7
56 2026-08-25 09:30 639232461630217327
654 ms 192.168.0.7
55 2026-08-25 09:30 639232461630217327
654 ms 192.168.0.5
54 2026-08-25 09:13 639232451282965990
904 ms 192.168.0.7
53 2026-08-25 09:13 639232451282965990
904 ms 192.168.0.5
52 2026-08-25 08:56 639232440814614938
828 ms 192.168.0.7
51 2026-08-25 08:56 639232440814614938
828 ms 192.168.0.5
50 2026-08-25 08:38 639232430410720425
890 ms 192.168.0.7
49 2026-08-25 08:38 639232430410720425
890 ms 192.168.0.5
48 2026-08-25 08:21 639232420003096185
588 ms 192.168.0.7
47 2026-08-25 08:21 639232420003096185
588 ms 192.168.0.5
46 2026-08-25 08:03 639232409467287444
632 ms 192.168.0.5
45 2026-08-25 08:03 639232409467287444
632 ms 192.168.0.7
44 2026-08-25 07:46 639232399077195997
618 ms 192.168.0.5
43 2026-08-25 07:46 639232399077195997
618 ms 192.168.0.7
42 2026-08-25 07:29 639232388731528337
1098 ms 192.168.0.7
41 2026-08-25 07:29 639232388731528337
1098 ms 192.168.0.5
40 2026-08-25 07:11 639232378288598612
598 ms 192.168.0.7
39 2026-08-25 07:11 639232378288598612
598 ms 192.168.0.5
38 2026-08-25 06:17 639232346196373643
634 ms 192.168.0.7
37 2026-08-25 06:17 639232346196373643
634 ms 192.168.0.5
36 2026-08-25 06:01 639232336112370741
3 ms 192.168.0.5
35 2026-08-25 06:01 639232336112370741
3 ms 192.168.0.7
34 2026-08-25 05:44 639232326146508970
615 ms 192.168.0.5
33 2026-08-25 05:44 639232326146508970
615 ms 192.168.0.7
32 2026-08-25 05:27 639232316189381720
2837 ms 192.168.0.5
31 2026-08-25 05:27 639232316189381720
2837 ms 192.168.0.7
30 2026-08-25 05:11 639232306217998913
627 ms 192.168.0.7
29 2026-08-25 05:11 639232306217998913
627 ms 192.168.0.5
28 2026-08-25 04:54 639232296255744174
645 ms 192.168.0.5
27 2026-08-25 04:54 639232296255744174
645 ms 192.168.0.7
26 2026-08-25 04:37 639232286095760789
627 ms 192.168.0.7
25 2026-08-25 04:37 639232286095760789
627 ms 192.168.0.5
24 2026-08-25 04:20 639232276086186273
625 ms 192.168.0.5
23 2026-08-25 04:20 639232276086186273
625 ms 192.168.0.7
22 2026-08-25 04:04 639232265900986425
2 ms 192.168.0.5
21 2026-08-25 04:04 639232265900986425
2 ms 192.168.0.7
20 2026-08-25 03:47 639232255723518075
642 ms 192.168.0.5
19 2026-08-25 03:47 639232255723518075
642 ms 192.168.0.7
18 2026-08-25 03:30 639232245484452890
588 ms 192.168.0.5
17 2026-08-25 03:30 639232245484452890
588 ms 192.168.0.7
16 2026-08-25 03:13 639232235157175331
625 ms 192.168.0.7
15 2026-08-25 03:13 639232235157175331
625 ms 192.168.0.5
14 2026-08-25 02:19 639232203197189095
648 ms 192.168.0.7
13 2026-08-25 02:19 639232203197189095
648 ms 192.168.0.5
12 2026-08-25 02:02 639232192844564298
625 ms 192.168.0.7
11 2026-08-25 02:02 639232192844564298
625 ms 192.168.0.5
10 2026-08-25 01:45 639232182496008942
614 ms 192.168.0.5
9 2026-08-25 01:45 639232182496008942
614 ms 192.168.0.7
8 2026-08-25 01:28 639232172197053132
595 ms 192.168.0.7
7 2026-08-25 01:28 639232172197053132
595 ms 192.168.0.5
6 2026-08-25 00:34 639232140250307418
2 ms 192.168.0.7
5 2026-08-25 00:34 639232140250307418
2 ms 192.168.0.5
4 2026-08-25 00:17 639232129927860324
608 ms 192.168.0.7
3 2026-08-25 00:17 639232129927860324
608 ms 192.168.0.5
2 2026-08-25 00:00 639232119551972438
624 ms 192.168.0.5
1 2026-08-25 00:00 639232119551972438
624 ms 192.168.0.7