History for ns21.firstdns.net
Domain: firstdns.net • Tracking since 2026-08-04 23:25 UTC
DNS response history for ns21.firstdns.net
ns21.firstdns.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 2026-08-24. For this date, NameServerHistory found 42 DNS check records, 40 successful responses, 2 failed responses, and 378 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 ns21.firstdns.net.
Records on Selected Date
42
Historical checks stored for this nameserver on selected date
Average Latency
378 ms
Calculated from available response records
Latest Check on Selected Date
2026-08-24 17:27
All timestamps shown in UTC
Latest Resolved IP on Selected Date
37.187.91.151
Most recently resolved hosting IP on selected date
Successful Responses
40
Checks that returned a measurable response
Failed Responses
2
Checks with no response or no returned latency
Failure Rate
5%
Based on the selected date history
Selected Date Status
Responsive
At least one successful response exists on selected date
History for ns21.firstdns.net
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 |
|---|---|---|---|---|---|
| 42 | 2026-08-24 17:27 | 639231890488117536 |
|
2019 ms | 37.187.91.151 |
| 41 | 2026-08-24 17:11 | 639231880574255543 |
|
6 ms | 37.187.91.151 |
| 40 | 2026-08-24 16:54 | 639231870418029045 |
|
71 ms | 37.187.91.151 |
| 39 | 2026-08-24 16:37 | 639231860258429562 |
|
6 ms | 37.187.91.151 |
| 38 | 2026-08-24 15:44 | 639231828211839931 |
|
26 ms | 37.187.91.151 |
| 37 | 2026-08-24 15:27 | 639231818080917481 |
|
7 ms | 37.187.91.151 |
| 36 | 2026-08-24 15:10 | 639231807961539652 |
|
118 ms | 37.187.91.151 |
| 35 | 2026-08-24 14:53 | 639231797631669865 |
|
47 ms | 37.187.91.151 |
| 34 | 2026-08-24 14:00 | 639231765923559455 |
|
2029 ms | 37.187.91.151 |
| 33 | 2026-08-24 13:43 | 639231755868832964 |
|
5 ms | 37.187.91.151 |
| 32 | 2026-08-24 13:26 | 639231745628278877 |
|
25 ms | 37.187.91.151 |
| 31 | 2026-08-24 13:09 | 639231735407682062 |
|
33 ms | 37.187.91.151 |
| 30 | 2026-08-24 12:16 | 639231703815441688 |
|
2040 ms | 37.187.91.151 |
| 29 | 2026-08-24 11:59 | 639231693747052549 |
|
8 ms | 37.187.91.151 |
| 28 | 2026-08-24 11:43 | 639231683712487276 |
|
- | |
| 27 | 2026-08-24 11:26 | 639231673513573868 |
|
2015 ms | 37.187.91.151 |
| 26 | 2026-08-24 10:33 | 639231641791249939 |
|
7 ms | 37.187.91.151 |
| 25 | 2026-08-24 10:16 | 639231631866211033 |
|
10 ms | 37.187.91.151 |
| 24 | 2026-08-24 09:59 | 639231621644955316 |
|
7 ms | 37.187.91.151 |
| 23 | 2026-08-24 09:42 | 639231611478799259 |
|
84 ms | 37.187.91.151 |
| 22 | 2026-08-24 08:50 | 639231579923718211 |
|
31 ms | 37.187.91.151 |
| 21 | 2026-08-24 08:33 | 639231569810702936 |
|
13 ms | 37.187.91.151 |
| 20 | 2026-08-24 08:16 | 639231559762411619 |
|
2041 ms | 37.187.91.151 |
| 19 | 2026-08-24 07:59 | 639231549663595407 |
|
15 ms | 37.187.91.151 |
| 18 | 2026-08-24 07:07 | 639231518076817246 |
|
15 ms | 37.187.91.151 |
| 17 | 2026-08-24 06:50 | 639231508078650885 |
|
36 ms | 37.187.91.151 |
| 16 | 2026-08-24 06:34 | 639231498210697093 |
|
33 ms | 37.187.91.151 |
| 15 | 2026-08-24 06:17 | 639231488109699360 |
|
20 ms | 37.187.91.151 |
| 14 | 2026-08-24 05:24 | 639231456772510692 |
|
43 ms | 37.187.91.151 |
| 13 | 2026-08-24 05:08 | 639231447084631185 |
|
5 ms | 37.187.91.151 |
| 12 | 2026-08-24 04:52 | 639231437208519473 |
|
4 ms | 37.187.91.151 |
| 11 | 2026-08-24 04:35 | 639231427209627490 |
|
22 ms | 37.187.91.151 |
| 10 | 2026-08-24 03:43 | 639231395791246644 |
|
60 ms | 37.187.91.151 |
| 9 | 2026-08-24 03:27 | 639231386075551458 |
|
4 ms | 37.187.91.151 |
| 8 | 2026-08-24 03:10 | 639231376208713791 |
|
25 ms | 37.187.91.151 |
| 7 | 2026-08-24 02:54 | 639231366170589276 |
|
- | |
| 6 | 2026-08-24 02:01 | 639231334732159368 |
|
35 ms | 37.187.91.151 |
| 5 | 2026-08-24 01:45 | 639231325035670078 |
|
21 ms | 37.187.91.151 |
| 4 | 2026-08-24 01:28 | 639231315132253837 |
|
6 ms | 37.187.91.151 |
| 3 | 2026-08-24 01:12 | 639231305014280808 |
|
2023 ms | 37.187.91.151 |
| 2 | 2026-08-24 00:20 | 639231273779380675 |
|
5 ms | 37.187.91.151 |
| 1 | 2026-08-24 00:04 | 639231264180839154 |
|
2093 ms | 37.187.91.151 |