History for ns-a.ustclug.org
Domain: ustclug.org • Tracking since 2026-08-04 23:25 UTC
DNS response history for ns-a.ustclug.org
ns-a.ustclug.org 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 2026-08-24. For this date, NameServerHistory found 34 DNS check records, 34 successful responses, 0 failed responses, and 1472 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 ns-a.ustclug.org.
Records on Selected Date
34
Historical checks stored for this nameserver on selected date
Average Latency
1472 ms
Calculated from available response records
Latest Check on Selected Date
2026-08-24 14:11
All timestamps shown in UTC
Latest Resolved IP on Selected Date
202.38.93.156
Most recently resolved hosting IP on selected date
Successful Responses
34
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 ns-a.ustclug.org
Showing DNS history for 2026-08-24 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 |
|---|---|---|---|---|---|
| 34 | 2026-08-24 14:11 | 639231765923559455 |
|
2368 ms | 202.38.93.156 |
| 33 | 2026-08-24 13:55 | 639231755868832964 |
|
1092 ms | 202.38.93.156 |
| 32 | 2026-08-24 13:38 | 639231745628278877 |
|
1087 ms | 202.38.93.156 |
| 31 | 2026-08-24 13:21 | 639231735407682062 |
|
4284 ms | 202.38.93.156 |
| 30 | 2026-08-24 12:28 | 639231703815441688 |
|
1092 ms | 202.38.93.156 |
| 29 | 2026-08-24 12:11 | 639231693747052549 |
|
1088 ms | 202.38.93.156 |
| 28 | 2026-08-24 11:55 | 639231683712487276 |
|
1045 ms | 202.38.93.156 |
| 27 | 2026-08-24 11:38 | 639231673513573868 |
|
2018 ms | 202.38.93.156 |
| 26 | 2026-08-24 10:44 | 639231641791249939 |
|
2008 ms | 202.38.93.156 |
| 25 | 2026-08-24 10:28 | 639231631866211033 |
|
1095 ms | 202.38.93.156 |
| 24 | 2026-08-24 10:11 | 639231621644955316 |
|
1085 ms | 202.38.93.156 |
| 23 | 2026-08-24 09:54 | 639231611478799259 |
|
1380 ms | 202.38.93.156 |
| 22 | 2026-08-24 09:01 | 639231579923718211 |
|
1092 ms | 202.38.93.156 |
| 21 | 2026-08-24 08:45 | 639231569810702936 |
|
1081 ms | 202.38.93.156 |
| 20 | 2026-08-24 08:28 | 639231559762411619 |
|
2345 ms | 202.38.93.156 |
| 19 | 2026-08-24 08:11 | 639231549663595407 |
|
1375 ms | 202.38.93.156 |
| 18 | 2026-08-24 07:18 | 639231518076817246 |
|
1086 ms | 202.38.93.156 |
| 17 | 2026-08-24 07:02 | 639231508078650885 |
|
1078 ms | 202.38.93.156 |
| 16 | 2026-08-24 06:45 | 639231498210697093 |
|
2296 ms | 202.38.93.156 |
| 15 | 2026-08-24 06:29 | 639231488109699360 |
|
2342 ms | 202.38.93.156 |
| 14 | 2026-08-24 05:36 | 639231456772510692 |
|
2239 ms | 202.38.93.156 |
| 13 | 2026-08-24 05:20 | 639231447084631185 |
|
1088 ms | 202.38.93.156 |
| 12 | 2026-08-24 05:03 | 639231437208519473 |
|
1087 ms | 202.38.93.156 |
| 11 | 2026-08-24 04:47 | 639231427209627490 |
|
1086 ms | 202.38.93.156 |
| 10 | 2026-08-24 03:54 | 639231395791246644 |
|
9 ms | 202.38.93.156 |
| 9 | 2026-08-24 03:38 | 639231386075551458 |
|
1086 ms | 202.38.93.156 |
| 8 | 2026-08-24 03:22 | 639231376208713791 |
|
2326 ms | 202.38.93.156 |
| 7 | 2026-08-24 03:05 | 639231366170589276 |
|
2011 ms | 202.38.93.156 |
| 6 | 2026-08-24 02:13 | 639231334732159368 |
|
1086 ms | 202.38.93.156 |
| 5 | 2026-08-24 01:56 | 639231325035670078 |
|
1087 ms | 202.38.93.156 |
| 4 | 2026-08-24 01:40 | 639231315132253837 |
|
1086 ms | 202.38.93.156 |
| 3 | 2026-08-24 01:24 | 639231305014280808 |
|
1353 ms | 202.38.93.156 |
| 2 | 2026-08-24 00:31 | 639231273779380675 |
|
1087 ms | 202.38.93.156 |
| 1 | 2026-08-24 00:15 | 639231264180839154 |
|
1088 ms | 202.38.93.156 |