History for www.substack.com
Domain: substack.com • Tracking since 2026-08-04 23:25 UTC
DNS response history for www.substack.com
www.substack.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 2026-08-21. For this date, NameServerHistory found 143 DNS check records, 142 successful responses, 1 failed responses, and 157 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 www.substack.com.
Records on Selected Date
143
Historical checks stored for this nameserver on selected date
Average Latency
157 ms
Calculated from available response records
Latest Check on Selected Date
2026-08-21 23:46
All timestamps shown in UTC
Latest Resolved IP on Selected Date
172.64.150.56
Most recently resolved hosting IP on selected date
Successful Responses
142
Checks that returned a measurable response
Failed Responses
1
Checks with no response or no returned latency
Failure Rate
1%
Based on the selected date history
Selected Date Status
Responsive
At least one successful response exists on selected date
History for www.substack.com
Showing DNS history for 2026-08-21 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 |
|---|---|---|---|---|---|
| 143 | 2026-08-21 23:46 | 639229527598660841 |
|
21 ms | 172.64.150.56 |
| 142 | 2026-08-21 23:46 | 639229527598660841 |
|
21 ms | 104.18.37.200 |
| 141 | 2026-08-21 23:29 | 639229517954323214 |
|
113 ms | 172.64.150.56 |
| 140 | 2026-08-21 23:29 | 639229517954323214 |
|
113 ms | 104.18.37.200 |
| 139 | 2026-08-21 23:13 | 639229508269999021 |
|
90 ms | 172.64.150.56 |
| 138 | 2026-08-21 23:13 | 639229508269999021 |
|
90 ms | 104.18.37.200 |
| 137 | 2026-08-21 22:57 | 639229498559060171 |
|
28 ms | 172.64.150.56 |
| 136 | 2026-08-21 22:57 | 639229498559060171 |
|
28 ms | 104.18.37.200 |
| 135 | 2026-08-21 22:40 | 639229488519347586 |
|
2023 ms | 104.18.37.200 |
| 134 | 2026-08-21 22:40 | 639229488519347586 |
|
2023 ms | 172.64.150.56 |
| 133 | 2026-08-21 21:47 | 639229456606578934 |
|
42 ms | 104.18.37.200 |
| 132 | 2026-08-21 21:47 | 639229456606578934 |
|
42 ms | 172.64.150.56 |
| 131 | 2026-08-21 21:31 | 639229446985772499 |
|
25 ms | 104.18.37.200 |
| 130 | 2026-08-21 21:31 | 639229446985772499 |
|
25 ms | 172.64.150.56 |
| 129 | 2026-08-21 21:15 | 639229437367313098 |
|
12 ms | 172.64.150.56 |
| 128 | 2026-08-21 21:15 | 639229437367313098 |
|
12 ms | 104.18.37.200 |
| 127 | 2026-08-21 20:59 | 639229427923950391 |
|
61 ms | 104.18.37.200 |
| 126 | 2026-08-21 20:59 | 639229427923950391 |
|
61 ms | 172.64.150.56 |
| 125 | 2026-08-21 20:43 | 639229418168588854 |
|
29 ms | 172.64.150.56 |
| 124 | 2026-08-21 20:43 | 639229418168588854 |
|
29 ms | 104.18.37.200 |
| 123 | 2026-08-21 20:27 | 639229408345678334 |
|
34 ms | 172.64.150.56 |
| 122 | 2026-08-21 20:27 | 639229408345678334 |
|
34 ms | 104.18.37.200 |
| 121 | 2026-08-21 20:11 | 639229398616354648 |
|
178 ms | 172.64.150.56 |
| 120 | 2026-08-21 20:11 | 639229398616354648 |
|
178 ms | 104.18.37.200 |
| 119 | 2026-08-21 19:54 | 639229388634592323 |
|
31 ms | 172.64.150.56 |
| 118 | 2026-08-21 19:54 | 639229388634592323 |
|
31 ms | 104.18.37.200 |
| 117 | 2026-08-21 19:37 | 639229378792837692 |
|
36 ms | 104.18.37.200 |
| 116 | 2026-08-21 19:37 | 639229378792837692 |
|
36 ms | 172.64.150.56 |
| 115 | 2026-08-21 19:21 | 639229369154682311 |
|
31 ms | 104.18.37.200 |
| 114 | 2026-08-21 19:21 | 639229369154682311 |
|
31 ms | 172.64.150.56 |
| 113 | 2026-08-21 19:05 | 639229359248017926 |
|
8 ms | 172.64.150.56 |
| 112 | 2026-08-21 19:05 | 639229359248017926 |
|
8 ms | 104.18.37.200 |
| 111 | 2026-08-21 18:48 | 639229349124294642 |
|
291 ms | 172.64.150.56 |
| 110 | 2026-08-21 18:48 | 639229349124294642 |
|
291 ms | 104.18.37.200 |
| 109 | 2026-08-21 17:56 | 639229317791715692 |
|
209 ms | 172.64.150.56 |
| 108 | 2026-08-21 17:56 | 639229317791715692 |
|
209 ms | 104.18.37.200 |
| 107 | 2026-08-21 17:40 | 639229308115194575 |
|
20 ms | 104.18.37.200 |
| 106 | 2026-08-21 17:40 | 639229308115194575 |
|
20 ms | 172.64.150.56 |
| 105 | 2026-08-21 17:23 | 639229298320320558 |
|
186 ms | 172.64.150.56 |
| 104 | 2026-08-21 17:23 | 639229298320320558 |
|
186 ms | 104.18.37.200 |
| 103 | 2026-08-21 17:07 | 639229288674863221 |
|
31 ms | 172.64.150.56 |
| 102 | 2026-08-21 17:07 | 639229288674863221 |
|
31 ms | 104.18.37.200 |
| 101 | 2026-08-21 16:51 | 639229278983677079 |
|
162 ms | 172.64.150.56 |
| 100 | 2026-08-21 16:51 | 639229278983677079 |
|
162 ms | 104.18.37.200 |
| 99 | 2026-08-21 16:35 | 639229269405517175 |
|
2018 ms | 172.64.150.56 |
| 98 | 2026-08-21 16:35 | 639229269405517175 |
|
2018 ms | 104.18.37.200 |
| 97 | 2026-08-21 16:19 | 639229259594798244 |
|
31 ms | 172.64.150.56 |
| 96 | 2026-08-21 16:19 | 639229259594798244 |
|
31 ms | 104.18.37.200 |
| 95 | 2026-08-21 16:02 | 639229249736681188 |
|
32 ms | 172.64.150.56 |
| 94 | 2026-08-21 16:02 | 639229249736681188 |
|
32 ms | 104.18.37.200 |
| 93 | 2026-08-21 15:46 | 639229239699417787 |
|
171 ms | 104.18.37.200 |
| 92 | 2026-08-21 15:46 | 639229239699417787 |
|
171 ms | 172.64.150.56 |
| 91 | 2026-08-21 15:29 | 639229229621964033 |
|
73 ms | 172.64.150.56 |
| 90 | 2026-08-21 15:29 | 639229229621964033 |
|
73 ms | 104.18.37.200 |
| 89 | 2026-08-21 15:12 | 639229219567270965 |
|
23 ms | 172.64.150.56 |
| 88 | 2026-08-21 15:12 | 639229219567270965 |
|
23 ms | 104.18.37.200 |
| 87 | 2026-08-21 14:55 | 639229209406666856 |
|
2022 ms | 104.18.37.200 |
| 86 | 2026-08-21 14:55 | 639229209406666856 |
|
2022 ms | 172.64.150.56 |
| 85 | 2026-08-21 14:03 | 639229177815876178 |
|
48 ms | 172.64.150.56 |
| 84 | 2026-08-21 14:03 | 639229177815876178 |
|
48 ms | 104.18.37.200 |
| 83 | 2026-08-21 13:47 | 639229168243572685 |
|
8 ms | 104.18.37.200 |
| 82 | 2026-08-21 13:47 | 639229168243572685 |
|
8 ms | 172.64.150.56 |
| 81 | 2026-08-21 13:31 | 639229158599856475 |
|
155 ms | 104.18.37.200 |
| 80 | 2026-08-21 13:31 | 639229158599856475 |
|
155 ms | 172.64.150.56 |
| 79 | 2026-08-21 13:15 | 639229148998940902 |
|
34 ms | 104.18.37.200 |
| 78 | 2026-08-21 13:15 | 639229148998940902 |
|
34 ms | 172.64.150.56 |
| 77 | 2026-08-21 12:58 | 639229139276923594 |
|
36 ms | 172.64.150.56 |
| 76 | 2026-08-21 12:58 | 639229139276923594 |
|
36 ms | 104.18.37.200 |
| 75 | 2026-08-21 12:42 | 639229129709912394 |
|
11 ms | 172.64.150.56 |
| 74 | 2026-08-21 12:42 | 639229129709912394 |
|
11 ms | 104.18.37.200 |
| 73 | 2026-08-21 12:26 | 639229119801488500 |
|
102 ms | 104.18.37.200 |
| 72 | 2026-08-21 12:26 | 639229119801488500 |
|
102 ms | 172.64.150.56 |
| 71 | 2026-08-21 12:10 | 639229110135262458 |
|
- | |
| 70 | 2026-08-21 11:53 | 639229100336051392 |
|
15 ms | 104.18.37.200 |
| 69 | 2026-08-21 11:53 | 639229100336051392 |
|
15 ms | 172.64.150.56 |
| 68 | 2026-08-21 11:37 | 639229090641415626 |
|
10 ms | 172.64.150.56 |
| 67 | 2026-08-21 11:37 | 639229090641415626 |
|
10 ms | 104.18.37.200 |
| 66 | 2026-08-21 11:21 | 639229080702683947 |
|
93 ms | 104.18.37.200 |
| 65 | 2026-08-21 11:21 | 639229080702683947 |
|
93 ms | 172.64.150.56 |
| 64 | 2026-08-21 11:04 | 639229070601456699 |
|
358 ms | 104.18.37.200 |
| 63 | 2026-08-21 11:04 | 639229070601456699 |
|
358 ms | 172.64.150.56 |
| 62 | 2026-08-21 10:11 | 639229038947447232 |
|
265 ms | 104.18.37.200 |
| 61 | 2026-08-21 10:11 | 639229038947447232 |
|
265 ms | 172.64.150.56 |
| 60 | 2026-08-21 09:55 | 639229029268708773 |
|
86 ms | 104.18.37.200 |
| 59 | 2026-08-21 09:55 | 639229029268708773 |
|
86 ms | 172.64.150.56 |
| 58 | 2026-08-21 09:39 | 639229019647910603 |
|
35 ms | 104.18.37.200 |
| 57 | 2026-08-21 09:39 | 639229019647910603 |
|
35 ms | 172.64.150.56 |
| 56 | 2026-08-21 09:23 | 639229009983843738 |
|
76 ms | 172.64.150.56 |
| 55 | 2026-08-21 09:23 | 639229009983843738 |
|
76 ms | 104.18.37.200 |
| 54 | 2026-08-21 09:07 | 639229000203331882 |
|
31 ms | 104.18.37.200 |
| 53 | 2026-08-21 09:07 | 639229000203331882 |
|
31 ms | 172.64.150.56 |
| 52 | 2026-08-21 08:50 | 639228990302335999 |
|
73 ms | 172.64.150.56 |
| 51 | 2026-08-21 08:50 | 639228990302335999 |
|
73 ms | 104.18.37.200 |
| 50 | 2026-08-21 08:34 | 639228980567740722 |
|
36 ms | 104.18.37.200 |
| 49 | 2026-08-21 08:34 | 639228980567740722 |
|
36 ms | 172.64.150.56 |
| 48 | 2026-08-21 08:17 | 639228970762445174 |
|
22 ms | 172.64.150.56 |
| 47 | 2026-08-21 08:17 | 639228970762445174 |
|
22 ms | 104.18.37.200 |
| 46 | 2026-08-21 08:01 | 639228961065054445 |
|
89 ms | 104.18.37.200 |
| 45 | 2026-08-21 08:01 | 639228961065054445 |
|
89 ms | 172.64.150.56 |
| 44 | 2026-08-21 07:45 | 639228951224649885 |
|
27 ms | 104.18.37.200 |
| 43 | 2026-08-21 07:45 | 639228951224649885 |
|
27 ms | 172.64.150.56 |
| 42 | 2026-08-21 07:28 | 639228941303864592 |
|
200 ms | 172.64.150.56 |
| 41 | 2026-08-21 07:28 | 639228941303864592 |
|
200 ms | 104.18.37.200 |
| 40 | 2026-08-21 07:11 | 639228931191328583 |
|
259 ms | 172.64.150.56 |
| 39 | 2026-08-21 07:11 | 639228931191328583 |
|
259 ms | 104.18.37.200 |
| 38 | 2026-08-21 06:19 | 639228899518173317 |
|
21 ms | 104.18.37.200 |
| 37 | 2026-08-21 06:19 | 639228899518173317 |
|
21 ms | 172.64.150.56 |
| 36 | 2026-08-21 06:02 | 639228889785027669 |
|
47 ms | 172.64.150.56 |
| 35 | 2026-08-21 06:02 | 639228889785027669 |
|
47 ms | 104.18.37.200 |
| 34 | 2026-08-21 05:46 | 639228880106330161 |
|
32 ms | 104.18.37.200 |
| 33 | 2026-08-21 05:46 | 639228880106330161 |
|
32 ms | 172.64.150.56 |
| 32 | 2026-08-21 05:30 | 639228870316184091 |
|
48 ms | 104.18.37.200 |
| 31 | 2026-08-21 05:30 | 639228870316184091 |
|
48 ms | 172.64.150.56 |
| 30 | 2026-08-21 05:14 | 639228860695366512 |
|
52 ms | 172.64.150.56 |
| 29 | 2026-08-21 05:14 | 639228860695366512 |
|
52 ms | 104.18.37.200 |
| 28 | 2026-08-21 04:58 | 639228851027209500 |
|
177 ms | 104.18.37.200 |
| 27 | 2026-08-21 04:58 | 639228851027209500 |
|
177 ms | 172.64.150.56 |
| 26 | 2026-08-21 04:42 | 639228841479265462 |
|
37 ms | 104.18.37.200 |
| 25 | 2026-08-21 04:42 | 639228841479265462 |
|
37 ms | 172.64.150.56 |
| 24 | 2026-08-21 04:26 | 639228831752962260 |
|
24 ms | 104.18.37.200 |
| 23 | 2026-08-21 04:26 | 639228831752962260 |
|
24 ms | 172.64.150.56 |
| 22 | 2026-08-21 04:09 | 639228821953295483 |
|
28 ms | 104.18.37.200 |
| 21 | 2026-08-21 04:09 | 639228821953295483 |
|
28 ms | 172.64.150.56 |
| 20 | 2026-08-21 03:53 | 639228812227429953 |
|
17 ms | 104.18.37.200 |
| 19 | 2026-08-21 03:53 | 639228812227429953 |
|
17 ms | 172.64.150.56 |
| 18 | 2026-08-21 03:37 | 639228802476107538 |
|
7 ms | 104.18.37.200 |
| 17 | 2026-08-21 03:37 | 639228802476107538 |
|
7 ms | 172.64.150.56 |
| 16 | 2026-08-21 03:20 | 639228792525492032 |
|
252 ms | 172.64.150.56 |
| 15 | 2026-08-21 03:20 | 639228792525492032 |
|
252 ms | 104.18.37.200 |
| 14 | 2026-08-21 02:28 | 639228761131421385 |
|
40 ms | 172.64.150.56 |
| 13 | 2026-08-21 02:28 | 639228761131421385 |
|
40 ms | 104.18.37.200 |
| 12 | 2026-08-21 02:12 | 639228751571206692 |
|
15 ms | 104.18.37.200 |
| 11 | 2026-08-21 02:12 | 639228751571206692 |
|
15 ms | 172.64.150.56 |
| 10 | 2026-08-21 01:56 | 639228741705571019 |
|
199 ms | 172.64.150.56 |
| 9 | 2026-08-21 01:56 | 639228741705571019 |
|
199 ms | 104.18.37.200 |
| 8 | 2026-08-21 01:39 | 639228731642208228 |
|
23 ms | 104.18.37.200 |
| 7 | 2026-08-21 01:39 | 639228731642208228 |
|
23 ms | 172.64.150.56 |
| 6 | 2026-08-21 00:47 | 639228700387002072 |
|
33 ms | 172.64.150.56 |
| 5 | 2026-08-21 00:47 | 639228700387002072 |
|
33 ms | 104.18.37.200 |
| 4 | 2026-08-21 00:31 | 639228690742014433 |
|
10 ms | 172.64.150.56 |
| 3 | 2026-08-21 00:31 | 639228690742014433 |
|
10 ms | 104.18.37.200 |
| 2 | 2026-08-21 00:14 | 639228680877937122 |
|
7 ms | 104.18.37.200 |
| 1 | 2026-08-21 00:14 | 639228680877937122 |
|
7 ms | 172.64.150.56 |