History for a.root-servers.net
Domain: root-servers.net • Tracking since 2026-08-04 23:25 UTC
DNS response history for a.root-servers.net
a.root-servers.net 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 2026-08-20. For this date, NameServerHistory found 57 DNS check records, 55 successful responses, 2 failed responses, and 166 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 a.root-servers.net.
Records on Selected Date
57
Historical checks stored for this nameserver on selected date
Average Latency
166 ms
Calculated from available response records
Latest Check on Selected Date
2026-08-20 23:58
All timestamps shown in UTC
Latest Resolved IP on Selected Date
198.41.0.4
Most recently resolved hosting IP on selected date
Successful Responses
55
Checks that returned a measurable response
Failed Responses
2
Checks with no response or no returned latency
Failure Rate
4%
Based on the selected date history
Selected Date Status
Responsive
At least one successful response exists on selected date
History for a.root-servers.net
Showing DNS history for 2026-08-20 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 |
|---|---|---|---|---|---|
| 57 | 2026-08-20 23:58 | 639228670775860800 |
|
22 ms | 198.41.0.4 |
| 56 | 2026-08-20 23:06 | 639228639850033448 |
|
2034 ms | 198.41.0.4 |
| 55 | 2026-08-20 22:50 | 639228630204271870 |
|
2 ms | 198.41.0.4 |
| 54 | 2026-08-20 22:33 | 639228620295091135 |
|
19 ms | 198.41.0.4 |
| 53 | 2026-08-20 22:17 | 639228610298336915 |
|
3 ms | 198.41.0.4 |
| 52 | 2026-08-20 21:24 | 639228578917047616 |
|
3 ms | 198.41.0.4 |
| 51 | 2026-08-20 21:08 | 639228569046445709 |
|
5 ms | 198.41.0.4 |
| 50 | 2026-08-20 20:51 | 639228558946830986 |
|
5 ms | 198.41.0.4 |
| 49 | 2026-08-20 20:35 | 639228548977359217 |
|
7 ms | 198.41.0.4 |
| 48 | 2026-08-20 19:42 | 639228517494157668 |
|
5 ms | 198.41.0.4 |
| 47 | 2026-08-20 19:25 | 639228507374116892 |
|
71 ms | 198.41.0.4 |
| 46 | 2026-08-20 19:09 | 639228497315154893 |
|
6 ms | 198.41.0.4 |
| 45 | 2026-08-20 18:52 | 639228487287648341 |
|
8 ms | 198.41.0.4 |
| 44 | 2026-08-20 17:59 | 639228455828123788 |
|
7 ms | 198.41.0.4 |
| 43 | 2026-08-20 17:43 | 639228445900082244 |
|
2024 ms | 198.41.0.4 |
| 42 | 2026-08-20 17:26 | 639228435866352323 |
|
3 ms | 198.41.0.4 |
| 41 | 2026-08-20 17:09 | 639228425802273151 |
|
2034 ms | 198.41.0.4 |
| 40 | 2026-08-20 16:16 | 639228393616324230 |
|
44 ms | 198.41.0.4 |
| 39 | 2026-08-20 15:59 | 639228383590408693 |
|
49 ms | 198.41.0.4 |
| 38 | 2026-08-20 15:42 | 639228373471467474 |
|
8 ms | 198.41.0.4 |
| 37 | 2026-08-20 15:25 | 639228363426647311 |
|
2 ms | 198.41.0.4 |
| 36 | 2026-08-20 14:32 | 639228331681701910 |
|
7 ms | 198.41.0.4 |
| 35 | 2026-08-20 14:16 | 639228321714746824 |
|
52 ms | 198.41.0.4 |
| 34 | 2026-08-20 13:59 | 639228311652090262 |
|
- | |
| 33 | 2026-08-20 13:42 | 639228301670088587 |
|
19 ms | 198.41.0.4 |
| 32 | 2026-08-20 12:50 | 639228269987976710 |
|
8 ms | 198.41.0.4 |
| 31 | 2026-08-20 12:33 | 639228260009452308 |
|
30 ms | 198.41.0.4 |
| 30 | 2026-08-20 12:16 | 639228249661740894 |
|
38 ms | 198.41.0.4 |
| 29 | 2026-08-20 11:59 | 639228239552680346 |
|
20 ms | 198.41.0.4 |
| 28 | 2026-08-20 11:06 | 639228207667580819 |
|
44 ms | 198.41.0.4 |
| 27 | 2026-08-20 10:49 | 639228197494011560 |
|
13 ms | 198.41.0.4 |
| 26 | 2026-08-20 10:32 | 639228187497039939 |
|
2025 ms | 198.41.0.4 |
| 25 | 2026-08-20 10:15 | 639228177408432646 |
|
8 ms | 198.41.0.4 |
| 24 | 2026-08-20 09:24 | 639228146356166262 |
|
- | |
| 23 | 2026-08-20 09:07 | 639228136541505712 |
|
18 ms | 198.41.0.4 |
| 22 | 2026-08-20 08:51 | 639228126519136598 |
|
106 ms | 198.41.0.4 |
| 21 | 2026-08-20 08:34 | 639228116537148885 |
|
3 ms | 198.41.0.4 |
| 20 | 2026-08-20 07:42 | 639228085320764351 |
|
12 ms | 198.41.0.4 |
| 19 | 2026-08-20 07:25 | 639228075444604839 |
|
28 ms | 198.41.0.4 |
| 18 | 2026-08-20 07:09 | 639228065615498985 |
|
3 ms | 198.41.0.4 |
| 17 | 2026-08-20 06:52 | 639228055675321422 |
|
19 ms | 198.41.0.4 |
| 16 | 2026-08-20 06:00 | 639228024230839396 |
|
7 ms | 198.41.0.4 |
| 15 | 2026-08-20 05:44 | 639228014720406505 |
|
11 ms | 198.41.0.4 |
| 14 | 2026-08-20 05:28 | 639228004930827030 |
|
13 ms | 198.41.0.4 |
| 13 | 2026-08-20 05:11 | 639227995103340154 |
|
24 ms | 198.41.0.4 |
| 12 | 2026-08-20 04:19 | 639227963811374894 |
|
4 ms | 198.41.0.4 |
| 11 | 2026-08-20 04:03 | 639227954132571365 |
|
3 ms | 198.41.0.4 |
| 10 | 2026-08-20 03:47 | 639227944541208342 |
|
19 ms | 198.41.0.4 |
| 9 | 2026-08-20 03:31 | 639227934657213484 |
|
8 ms | 198.41.0.4 |
| 8 | 2026-08-20 02:39 | 639227903628145469 |
|
29 ms | 198.41.0.4 |
| 7 | 2026-08-20 02:23 | 639227893995483475 |
|
8 ms | 198.41.0.4 |
| 6 | 2026-08-20 02:07 | 639227884280244209 |
|
38 ms | 198.41.0.4 |
| 5 | 2026-08-20 01:50 | 639227874371147132 |
|
62 ms | 198.41.0.4 |
| 4 | 2026-08-20 00:58 | 639227843224256432 |
|
38 ms | 198.41.0.4 |
| 3 | 2026-08-20 00:43 | 639227833720403506 |
|
36 ms | 198.41.0.4 |
| 2 | 2026-08-20 00:27 | 639227824170728278 |
|
8 ms | 198.41.0.4 |
| 1 | 2026-08-20 00:11 | 639227814865867570 |
|
7 ms | 198.41.0.4 |