History for dns01.headlock.co.jp
Domain: headlock.co.jp • Tracking since 2026-08-04 23:25 UTC
DNS response history for dns01.headlock.co.jp
dns01.headlock.co.jp 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 42 DNS check records, 42 successful responses, 0 failed responses, and 452 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 dns01.headlock.co.jp.
Records on Selected Date
42
Historical checks stored for this nameserver on selected date
Average Latency
452 ms
Calculated from available response records
Latest Check on Selected Date
2026-08-25 14:25
All timestamps shown in UTC
Latest Resolved IP on Selected Date
221.112.199.146
Most recently resolved hosting IP on selected date
Successful Responses
42
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 dns01.headlock.co.jp
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 |
|---|---|---|---|---|---|
| 42 | 2026-08-25 14:25 | 639232638994329666 |
|
490 ms | 221.112.199.146 |
| 41 | 2026-08-25 14:08 | 639232628614783237 |
|
18 ms | 221.112.199.146 |
| 40 | 2026-08-25 13:50 | 639232618360728578 |
|
306 ms | 221.112.199.146 |
| 39 | 2026-08-25 13:33 | 639232608016476376 |
|
523 ms | 221.112.199.146 |
| 38 | 2026-08-25 13:16 | 639232597643611557 |
|
535 ms | 221.112.199.146 |
| 37 | 2026-08-25 12:59 | 639232587225721862 |
|
5 ms | 221.112.199.146 |
| 36 | 2026-08-25 12:41 | 639232576780683689 |
|
320 ms | 221.112.199.146 |
| 35 | 2026-08-25 12:24 | 639232566381512620 |
|
485 ms | 221.112.199.146 |
| 34 | 2026-08-25 12:07 | 639232556111768563 |
|
538 ms | 221.112.199.146 |
| 33 | 2026-08-25 11:49 | 639232545839529039 |
|
534 ms | 221.112.199.146 |
| 32 | 2026-08-25 11:32 | 639232535349285207 |
|
562 ms | 221.112.199.146 |
| 31 | 2026-08-25 11:15 | 639232524938080723 |
|
537 ms | 221.112.199.146 |
| 30 | 2026-08-25 10:21 | 639232492740373468 |
|
520 ms | 221.112.199.146 |
| 29 | 2026-08-25 10:04 | 639232482235303141 |
|
530 ms | 221.112.199.146 |
| 28 | 2026-08-25 09:46 | 639232471861770303 |
|
848 ms | 221.112.199.146 |
| 27 | 2026-08-25 09:29 | 639232461630217327 |
|
723 ms | 221.112.199.146 |
| 26 | 2026-08-25 09:12 | 639232451282965990 |
|
530 ms | 221.112.199.146 |
| 25 | 2026-08-25 08:55 | 639232440814614938 |
|
310 ms | 221.112.199.146 |
| 24 | 2026-08-25 08:37 | 639232430410720425 |
|
549 ms | 221.112.199.146 |
| 23 | 2026-08-25 08:20 | 639232420003096185 |
|
550 ms | 221.112.199.146 |
| 22 | 2026-08-25 08:03 | 639232409467287444 |
|
503 ms | 221.112.199.146 |
| 21 | 2026-08-25 07:45 | 639232399077195997 |
|
517 ms | 221.112.199.146 |
| 20 | 2026-08-25 07:28 | 639232388731528337 |
|
481 ms | 221.112.199.146 |
| 19 | 2026-08-25 07:10 | 639232378288598612 |
|
536 ms | 221.112.199.146 |
| 18 | 2026-08-25 06:17 | 639232346196373643 |
|
3 ms | 221.112.199.146 |
| 17 | 2026-08-25 06:00 | 639232336112370741 |
|
3 ms | 221.112.199.146 |
| 16 | 2026-08-25 05:43 | 639232326146508970 |
|
477 ms | 221.112.199.146 |
| 15 | 2026-08-25 05:26 | 639232316189381720 |
|
488 ms | 221.112.199.146 |
| 14 | 2026-08-25 05:10 | 639232306217998913 |
|
494 ms | 221.112.199.146 |
| 13 | 2026-08-25 04:53 | 639232296255744174 |
|
2 ms | 221.112.199.146 |
| 12 | 2026-08-25 04:36 | 639232286095760789 |
|
564 ms | 221.112.199.146 |
| 11 | 2026-08-25 04:20 | 639232276086186273 |
|
511 ms | 221.112.199.146 |
| 10 | 2026-08-25 04:03 | 639232265900986425 |
|
520 ms | 221.112.199.146 |
| 9 | 2026-08-25 03:46 | 639232255723518075 |
|
504 ms | 221.112.199.146 |
| 8 | 2026-08-25 03:29 | 639232245484452890 |
|
518 ms | 221.112.199.146 |
| 7 | 2026-08-25 03:12 | 639232235157175331 |
|
525 ms | 221.112.199.146 |
| 6 | 2026-08-25 02:18 | 639232203197189095 |
|
312 ms | 221.112.199.146 |
| 5 | 2026-08-25 02:01 | 639232192844564298 |
|
534 ms | 221.112.199.146 |
| 4 | 2026-08-25 01:44 | 639232182496008942 |
|
505 ms | 221.112.199.146 |
| 3 | 2026-08-25 01:27 | 639232172197053132 |
|
533 ms | 221.112.199.146 |
| 2 | 2026-08-25 00:33 | 639232140250307418 |
|
510 ms | 221.112.199.146 |
| 1 | 2026-08-25 00:16 | 639232129927860324 |
|
519 ms | 221.112.199.146 |