DNS response history for ns1.51cdn.com

ns1.51cdn.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 2026-08-26. For this date, NameServerHistory found 64 DNS check records, 64 successful responses, 0 failed responses, and 594 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 ns1.51cdn.com.
Records on Selected Date

64

Historical checks stored for this nameserver on selected date

Average Latency

594 ms

Calculated from available response records

Latest Check on Selected Date

2026-08-26 10:11

All timestamps shown in UTC

Latest Resolved IP on Selected Date

121.14.228.169

Most recently resolved hosting IP on selected date

Successful Responses

64

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 ns1.51cdn.com

Showing DNS history for 2026-08-26 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
64 2026-08-26 10:11 639233350067824371
512 ms 121.14.228.169
63 2026-08-26 10:11 639233350067824371
512 ms 61.129.75.225
62 2026-08-26 09:54 639233339545274518
506 ms 121.14.228.169
61 2026-08-26 09:54 639233339545274518
506 ms 61.129.75.225
60 2026-08-26 09:36 639233329214918079
528 ms 121.14.228.169
59 2026-08-26 09:36 639233329214918079
528 ms 61.129.75.225
58 2026-08-26 09:19 639233318749762337
723 ms 61.129.75.225
57 2026-08-26 09:19 639233318749762337
723 ms 121.14.228.169
56 2026-08-26 09:02 639233308387917838
985 ms 61.129.75.225
55 2026-08-26 09:02 639233308387917838
985 ms 121.14.228.169
54 2026-08-26 08:44 639233297961740122
750 ms 121.14.228.169
53 2026-08-26 08:44 639233297961740122
750 ms 61.129.75.225
52 2026-08-26 08:27 639233287487159094
774 ms 121.14.228.169
51 2026-08-26 08:27 639233287487159094
774 ms 61.129.75.225
50 2026-08-26 08:09 639233276995531707
533 ms 61.129.75.225
49 2026-08-26 08:09 639233276995531707
533 ms 121.14.228.169
48 2026-08-26 07:52 639233266521568229
564 ms 121.14.228.169
47 2026-08-26 07:52 639233266521568229
564 ms 61.129.75.225
46 2026-08-26 07:34 639233256081047431
557 ms 121.14.228.169
45 2026-08-26 07:34 639233256081047431
557 ms 61.129.75.225
44 2026-08-26 06:40 639233223620132921
468 ms 121.14.228.169
43 2026-08-26 06:40 639233223620132921
468 ms 61.129.75.225
42 2026-08-26 06:23 639233213287814244
487 ms 121.14.228.169
41 2026-08-26 06:23 639233213287814244
487 ms 61.129.75.225
40 2026-08-26 06:06 639233202925983161
456 ms 61.129.75.225
39 2026-08-26 06:06 639233202925983161
456 ms 121.14.228.169
38 2026-08-26 05:49 639233192644780696
534 ms 61.129.75.225
37 2026-08-26 05:49 639233192644780696
534 ms 121.14.228.169
36 2026-08-26 05:31 639233182401183833
275 ms 121.14.228.169
35 2026-08-26 05:31 639233182401183833
275 ms 61.129.75.225
34 2026-08-26 05:14 639233172074181051
1085 ms 121.14.228.169
33 2026-08-26 05:14 639233172074181051
1085 ms 61.129.75.225
32 2026-08-26 04:57 639233161808421455
527 ms 61.129.75.225
31 2026-08-26 04:57 639233161808421455
527 ms 121.14.228.169
30 2026-08-26 04:40 639233151357344052
458 ms 121.14.228.169
29 2026-08-26 04:40 639233151357344052
458 ms 61.129.75.225
28 2026-08-26 04:23 639233141034116946
539 ms 61.129.75.225
27 2026-08-26 04:23 639233141034116946
539 ms 121.14.228.169
26 2026-08-26 04:05 639233130828334142
555 ms 121.14.228.169
25 2026-08-26 04:05 639233130828334142
555 ms 61.129.75.225
24 2026-08-26 03:48 639233120373450007
498 ms 61.129.75.225
23 2026-08-26 03:48 639233120373450007
498 ms 121.14.228.169
22 2026-08-26 03:31 639233110066216193
445 ms 121.14.228.169
21 2026-08-26 03:31 639233110066216193
445 ms 61.129.75.225
20 2026-08-26 02:38 639233078065410564
517 ms 121.14.228.169
19 2026-08-26 02:38 639233078065410564
517 ms 61.129.75.225
18 2026-08-26 02:21 639233067787457832
517 ms 61.129.75.225
17 2026-08-26 02:21 639233067787457832
517 ms 121.14.228.169
16 2026-08-26 02:03 639233057501801162
816 ms 121.14.228.169
15 2026-08-26 02:03 639233057501801162
816 ms 61.129.75.225
14 2026-08-26 01:46 639233047089431703
520 ms 121.14.228.169
13 2026-08-26 01:46 639233047089431703
520 ms 61.129.75.225
12 2026-08-26 01:29 639233036754790688
550 ms 61.129.75.225
11 2026-08-26 01:29 639233036754790688
550 ms 121.14.228.169
10 2026-08-26 01:12 639233026412602472
550 ms 61.129.75.225
9 2026-08-26 01:12 639233026412602472
550 ms 121.14.228.169
8 2026-08-26 00:54 639233016064066127
718 ms 121.14.228.169
7 2026-08-26 00:54 639233016064066127
718 ms 61.129.75.225
6 2026-08-26 00:37 639233005922655772
456 ms 61.129.75.225
5 2026-08-26 00:37 639233005922655772
456 ms 121.14.228.169
4 2026-08-26 00:20 639232995672256907
601 ms 121.14.228.169
3 2026-08-26 00:20 639232995672256907
601 ms 61.129.75.225
2 2026-08-26 00:03 639232985300872416
1015 ms 121.14.228.169
1 2026-08-26 00:03 639232985300872416
1015 ms 61.129.75.225