DNS response history for ns1.cncfstack.com

ns1.cncfstack.com 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 2026-08-11. For this date, NameServerHistory found 76 DNS check records, 76 successful responses, 0 failed responses, and 516 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.cncfstack.com.
Records on Selected Date

76

Historical checks stored for this nameserver on selected date

Average Latency

516 ms

Calculated from available response records

Latest Check on Selected Date

2026-08-11 23:44

All timestamps shown in UTC

Latest Resolved IP on Selected Date

121.40.25.167

Most recently resolved hosting IP on selected date

Successful Responses

76

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.cncfstack.com

Showing DNS history for 2026-08-11 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
76 2026-08-11 23:44 639220878864937382
239 ms 121.40.25.167
75 2026-08-11 22:51 639220847369072314
481 ms 121.40.25.167
74 2026-08-11 22:36 639220838037764925
469 ms 121.40.25.167
73 2026-08-11 22:20 639220828735120634
465 ms 121.40.25.167
72 2026-08-11 22:05 639220819447979766
476 ms 121.40.25.167
71 2026-08-11 21:49 639220810056531741
472 ms 121.40.25.167
70 2026-08-11 21:34 639220800745746593
492 ms 121.40.25.167
69 2026-08-11 21:18 639220791351626349
464 ms 121.40.25.167
68 2026-08-11 21:03 639220782021256610
472 ms 121.40.25.167
67 2026-08-11 20:47 639220772603347755
471 ms 121.40.25.167
66 2026-08-11 20:31 639220763224057047
471 ms 121.40.25.167
65 2026-08-11 20:15 639220753691117767
246 ms 121.40.25.167
64 2026-08-11 20:00 639220744107836218
473 ms 121.40.25.167
63 2026-08-11 19:06 639220711927629898
488 ms 121.40.25.167
62 2026-08-11 18:50 639220702299437921
468 ms 121.40.25.167
61 2026-08-11 18:34 639220692505468181
496 ms 121.40.25.167
60 2026-08-11 18:18 639220682669911239
470 ms 121.40.25.167
59 2026-08-11 18:01 639220672929841526
477 ms 121.40.25.167
58 2026-08-11 17:45 639220663225662315
490 ms 121.40.25.167
57 2026-08-11 17:29 639220653846255684
494 ms 121.40.25.167
56 2026-08-11 17:13 639220644420909059
507 ms 121.40.25.167
55 2026-08-11 16:58 639220635074970435
1059 ms 121.40.25.167
54 2026-08-11 16:42 639220625614385966
462 ms 121.40.25.167
53 2026-08-11 16:26 639220616132212636
476 ms 121.40.25.167
52 2026-08-11 16:10 639220606533651662
496 ms 121.40.25.167
51 2026-08-11 15:17 639220574514514318
478 ms 121.40.25.167
50 2026-08-11 15:01 639220565124823874
478 ms 121.40.25.167
49 2026-08-11 14:45 639220555799311478
324 ms 121.40.25.167
48 2026-08-11 14:30 639220546481577614
608 ms 121.40.25.167
47 2026-08-11 14:14 639220537036533154
1335 ms 121.40.25.167
46 2026-08-11 13:59 639220527719177174
512 ms 121.40.25.167
45 2026-08-11 13:43 639220518173088308
259 ms 121.40.25.167
44 2026-08-11 13:27 639220508902896243
256 ms 121.40.25.167
43 2026-08-11 13:12 639220499455923005
533 ms 121.40.25.167
42 2026-08-11 12:56 639220490082583768
555 ms 121.40.25.167
41 2026-08-11 12:40 639220480636590998
781 ms 121.40.25.167
40 2026-08-11 12:25 639220469585029273
986 ms 121.40.25.167
39 2026-08-11 11:29 639220438074188884
993 ms 121.40.25.167
38 2026-08-11 11:14 639220428789720049
989 ms 121.40.25.167
37 2026-08-11 10:58 639220419558302820
505 ms 121.40.25.167
36 2026-08-11 10:43 639220410448738795
491 ms 121.40.25.167
35 2026-08-11 10:28 639220401034081530
989 ms 121.40.25.167
34 2026-08-11 10:12 639220391766674161
234 ms 121.40.25.167
33 2026-08-11 09:57 639220382275807148
498 ms 121.40.25.167
32 2026-08-11 09:41 639220373034162867
494 ms 121.40.25.167
31 2026-08-11 09:26 639220363994971859
992 ms 121.40.25.167
30 2026-08-11 09:10 639220354563965455
487 ms 121.40.25.167
29 2026-08-11 08:55 639220345437414880
971 ms 121.40.25.167
28 2026-08-11 08:39 639220336024248987
239 ms 121.40.25.167
27 2026-08-11 07:47 639220304233635692
498 ms 121.40.25.167
26 2026-08-11 07:31 639220294872170960
250 ms 121.40.25.167
25 2026-08-11 07:15 639220285547177980
983 ms 121.40.25.167
24 2026-08-11 07:00 639220276337941315
483 ms 121.40.25.167
23 2026-08-11 06:44 639220267175191677
489 ms 121.40.25.167
22 2026-08-11 06:29 639220257981518924
251 ms 121.40.25.167
21 2026-08-11 06:14 639220249265489070
242 ms 121.40.25.167
20 2026-08-11 06:00 639220240700249205
887 ms 121.40.25.167
19 2026-08-11 05:45 639220231975029986
483 ms 121.40.25.167
18 2026-08-11 05:31 639220223261176932
241 ms 121.40.25.167
17 2026-08-11 05:16 639220214366718456
256 ms 121.40.25.167
16 2026-08-11 05:01 639220205306334524
551 ms 121.40.25.167
15 2026-08-11 04:10 639220174463175061
244 ms 121.40.25.167
14 2026-08-11 03:55 639220165777190438
239 ms 121.40.25.167
13 2026-08-11 03:41 639220156880374825
491 ms 121.40.25.167
12 2026-08-11 03:26 639220148139986945
233 ms 121.40.25.167
11 2026-08-11 03:11 639220139271074299
349 ms 121.40.25.167
10 2026-08-11 02:56 639220130565901336
244 ms 121.40.25.167
9 2026-08-11 02:42 639220121659980575
271 ms 121.40.25.167
8 2026-08-11 02:27 639220112857650894
986 ms 121.40.25.167
7 2026-08-11 02:12 639220103767686219
242 ms 121.40.25.167
6 2026-08-11 01:57 639220094545970611
484 ms 121.40.25.167
5 2026-08-11 01:41 639220085476091081
1004 ms 121.40.25.167
4 2026-08-11 01:26 639220076243751161
485 ms 121.40.25.167
3 2026-08-11 00:35 639220045322845190
809 ms 121.40.25.167
2 2026-08-11 00:20 639220036434132314
249 ms 121.40.25.167
1 2026-08-11 00:05 639220027366289509
232 ms 121.40.25.167