DNS response history for dc09-ns01.isfnet.com

dc09-ns01.isfnet.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 2026-08-22. For this date, NameServerHistory found 74 DNS check records, 74 successful responses, 0 failed responses, and 399 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 dc09-ns01.isfnet.com.
Records on Selected Date

74

Historical checks stored for this nameserver on selected date

Average Latency

399 ms

Calculated from available response records

Latest Check on Selected Date

2026-08-22 23:59

All timestamps shown in UTC

Latest Resolved IP on Selected Date

153.153.156.159

Most recently resolved hosting IP on selected date

Successful Responses

74

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 dc09-ns01.isfnet.com

Showing DNS history for 2026-08-22 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
74 2026-08-22 23:59 639230391807229016
192 ms 153.153.156.159
73 2026-08-22 23:43 639230382051619327
497 ms 153.153.156.159
72 2026-08-22 23:26 639230372323353529
501 ms 153.153.156.159
71 2026-08-22 23:10 639230362586451064
282 ms 153.153.156.159
70 2026-08-22 22:54 639230352793666303
458 ms 153.153.156.159
69 2026-08-22 22:37 639230342775737758
357 ms 153.153.156.159
68 2026-08-22 22:21 639230332639939561
488 ms 153.153.156.159
67 2026-08-22 21:28 639230301014190104
461 ms 153.153.156.159
66 2026-08-22 21:11 639230291048161498
4 ms 153.153.156.159
65 2026-08-22 20:54 639230280894353664
490 ms 153.153.156.159
64 2026-08-22 20:37 639230270699419073
493 ms 153.153.156.159
63 2026-08-22 20:20 639230260248163050
254 ms 153.153.156.159
62 2026-08-22 20:03 639230250122494282
530 ms 153.153.156.159
61 2026-08-22 19:46 639230239972935046
449 ms 153.153.156.159
60 2026-08-22 19:29 639230229963262464
281 ms 153.153.156.159
59 2026-08-22 19:12 639230220033804658
4 ms 153.153.156.159
58 2026-08-22 18:56 639230209891107289
256 ms 153.153.156.159
57 2026-08-22 18:39 639230199630298717
680 ms 153.153.156.159
56 2026-08-22 18:22 639230189301984150
376 ms 153.153.156.159
55 2026-08-22 17:28 639230157138468804
364 ms 153.153.156.159
54 2026-08-22 17:11 639230146987869495
282 ms 153.153.156.159
53 2026-08-22 16:54 639230136768638516
275 ms 153.153.156.159
52 2026-08-22 16:37 639230126735907877
271 ms 153.153.156.159
51 2026-08-22 16:20 639230116551187768
276 ms 153.153.156.159
50 2026-08-22 16:03 639230106335615913
269 ms 153.153.156.159
49 2026-08-22 15:46 639230096177758176
273 ms 153.153.156.159
48 2026-08-22 15:29 639230086185999993
304 ms 153.153.156.159
47 2026-08-22 15:13 639230076247854903
4 ms 153.153.156.159
46 2026-08-22 14:56 639230066076077530
488 ms 153.153.156.159
45 2026-08-22 14:39 639230055738197328
526 ms 153.153.156.159
44 2026-08-22 14:22 639230045411225521
334 ms 153.153.156.159
43 2026-08-22 13:28 639230013046000470
605 ms 153.153.156.159
42 2026-08-22 13:11 639230003090037878
439 ms 153.153.156.159
41 2026-08-22 12:54 639229993008259475
9 ms 153.153.156.159
40 2026-08-22 12:38 639229982909449470
279 ms 153.153.156.159
39 2026-08-22 12:21 639229973035502212
330 ms 153.153.156.159
38 2026-08-22 12:04 639229963064296145
329 ms 153.153.156.159
37 2026-08-22 11:48 639229952996162143
3 ms 153.153.156.159
36 2026-08-22 11:31 639229943051949195
329 ms 153.153.156.159
35 2026-08-22 11:14 639229932919214934
3 ms 153.153.156.159
34 2026-08-22 10:57 639229922745889838
806 ms 153.153.156.159
33 2026-08-22 10:40 639229912587214796
466 ms 153.153.156.159
32 2026-08-22 10:23 639229902240004454
3 ms 153.153.156.159
31 2026-08-22 09:31 639229870800501662
275 ms 153.153.156.159
30 2026-08-22 09:14 639229861058384956
257 ms 153.153.156.159
29 2026-08-22 08:58 639229851158592604
252 ms 153.153.156.159
28 2026-08-22 08:42 639229841475569629
15 ms 153.153.156.159
27 2026-08-22 08:26 639229831887658471
356 ms 153.153.156.159
26 2026-08-22 08:09 639229822043670346
434 ms 153.153.156.159
25 2026-08-22 07:53 639229812327913936
2226 ms 153.153.156.159
24 2026-08-22 07:37 639229802629488686
32 ms 153.153.156.159
23 2026-08-22 07:21 639229793051447309
304 ms 153.153.156.159
22 2026-08-22 07:05 639229783303531961
307 ms 153.153.156.159
21 2026-08-22 06:48 639229773458051942
2117 ms 153.153.156.159
20 2026-08-22 06:32 639229763373848056
360 ms 153.153.156.159
19 2026-08-22 05:39 639229732140622809
247 ms 153.153.156.159
18 2026-08-22 05:23 639229722699695967
280 ms 153.153.156.159
17 2026-08-22 05:07 639229713097498075
309 ms 153.153.156.159
16 2026-08-22 04:52 639229703543969637
2275 ms 153.153.156.159
15 2026-08-22 04:36 639229693970392873
385 ms 153.153.156.159
14 2026-08-22 04:20 639229684277329469
396 ms 153.153.156.159
13 2026-08-22 04:03 639229674501596661
271 ms 153.153.156.159
12 2026-08-22 03:47 639229665064441147
3 ms 153.153.156.159
11 2026-08-22 03:31 639229655507536872
3 ms 153.153.156.159
10 2026-08-22 03:15 639229645849603111
4 ms 153.153.156.159
9 2026-08-22 02:59 639229636090497453
353 ms 153.153.156.159
8 2026-08-22 02:43 639229625978544281
8 ms 153.153.156.159
7 2026-08-22 01:50 639229594644662176
275 ms 153.153.156.159
6 2026-08-22 01:34 639229585214633065
404 ms 153.153.156.159
5 2026-08-22 01:18 639229575581042175
277 ms 153.153.156.159
4 2026-08-22 01:02 639229565912268962
278 ms 153.153.156.159
3 2026-08-22 00:46 639229556237813203
30 ms 153.153.156.159
2 2026-08-22 00:30 639229546625802518
2188 ms 153.153.156.159
1 2026-08-22 00:14 639229537172016621
275 ms 153.153.156.159