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 2026-08-20. For this date, NameServerHistory found 113 DNS check records, 112 successful responses, 1 failed responses, and 190 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
113
Historical checks stored for this nameserver on selected date
Average Latency
190 ms
Calculated from available response records
Latest Check on Selected Date
2026-08-20 23:57
All timestamps shown in UTC
Latest Resolved IP on Selected Date
104.18.37.200
Most recently resolved hosting IP on selected date
Successful Responses
112
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 2026-08-20 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 |
|---|---|---|---|---|---|
| 113 | 2026-08-20 23:57 | 639228670775860800 |
|
30 ms | 104.18.37.200 |
| 112 | 2026-08-20 23:57 | 639228670775860800 |
|
30 ms | 172.64.150.56 |
| 111 | 2026-08-20 23:06 | 639228639850033448 |
|
36 ms | 104.18.37.200 |
| 110 | 2026-08-20 23:06 | 639228639850033448 |
|
36 ms | 172.64.150.56 |
| 109 | 2026-08-20 22:50 | 639228630204271870 |
|
11 ms | 172.64.150.56 |
| 108 | 2026-08-20 22:50 | 639228630204271870 |
|
11 ms | 104.18.37.200 |
| 107 | 2026-08-20 22:33 | 639228620295091135 |
|
37 ms | 172.64.150.56 |
| 106 | 2026-08-20 22:33 | 639228620295091135 |
|
37 ms | 104.18.37.200 |
| 105 | 2026-08-20 22:17 | 639228610298336915 |
|
300 ms | 104.18.37.200 |
| 104 | 2026-08-20 22:17 | 639228610298336915 |
|
300 ms | 172.64.150.56 |
| 103 | 2026-08-20 21:24 | 639228578917047616 |
|
70 ms | 104.18.37.200 |
| 102 | 2026-08-20 21:24 | 639228578917047616 |
|
70 ms | 172.64.150.56 |
| 101 | 2026-08-20 21:08 | 639228569046445709 |
|
9 ms | 172.64.150.56 |
| 100 | 2026-08-20 21:08 | 639228569046445709 |
|
9 ms | 104.18.37.200 |
| 99 | 2026-08-20 20:51 | 639228558946830986 |
|
220 ms | 172.64.150.56 |
| 98 | 2026-08-20 20:51 | 639228558946830986 |
|
220 ms | 104.18.37.200 |
| 97 | 2026-08-20 20:34 | 639228548977359217 |
|
31 ms | 104.18.37.200 |
| 96 | 2026-08-20 20:34 | 639228548977359217 |
|
31 ms | 172.64.150.56 |
| 95 | 2026-08-20 19:42 | 639228517494157668 |
|
29 ms | 172.64.150.56 |
| 94 | 2026-08-20 19:42 | 639228517494157668 |
|
29 ms | 104.18.37.200 |
| 93 | 2026-08-20 19:25 | 639228507374116892 |
|
111 ms | 104.18.37.200 |
| 92 | 2026-08-20 19:25 | 639228507374116892 |
|
111 ms | 172.64.150.56 |
| 91 | 2026-08-20 19:08 | 639228497315154893 |
|
36 ms | 172.64.150.56 |
| 90 | 2026-08-20 19:08 | 639228497315154893 |
|
36 ms | 104.18.37.200 |
| 89 | 2026-08-20 18:52 | 639228487287648341 |
|
37 ms | 172.64.150.56 |
| 88 | 2026-08-20 18:52 | 639228487287648341 |
|
37 ms | 104.18.37.200 |
| 87 | 2026-08-20 17:59 | 639228455828123788 |
|
22 ms | 104.18.37.200 |
| 86 | 2026-08-20 17:59 | 639228455828123788 |
|
22 ms | 172.64.150.56 |
| 85 | 2026-08-20 17:43 | 639228445900082244 |
|
35 ms | 172.64.150.56 |
| 84 | 2026-08-20 17:43 | 639228445900082244 |
|
35 ms | 104.18.37.200 |
| 83 | 2026-08-20 17:26 | 639228435866352323 |
|
6 ms | 172.64.150.56 |
| 82 | 2026-08-20 17:26 | 639228435866352323 |
|
6 ms | 104.18.37.200 |
| 81 | 2026-08-20 17:09 | 639228425802273151 |
|
304 ms | 104.18.37.200 |
| 80 | 2026-08-20 17:09 | 639228425802273151 |
|
304 ms | 172.64.150.56 |
| 79 | 2026-08-20 16:16 | 639228393616324230 |
|
14 ms | 104.18.37.200 |
| 78 | 2026-08-20 16:16 | 639228393616324230 |
|
14 ms | 172.64.150.56 |
| 77 | 2026-08-20 15:59 | 639228383590408693 |
|
166 ms | 172.64.150.56 |
| 76 | 2026-08-20 15:59 | 639228383590408693 |
|
166 ms | 104.18.37.200 |
| 75 | 2026-08-20 15:42 | 639228373471467474 |
|
15 ms | 104.18.37.200 |
| 74 | 2026-08-20 15:42 | 639228373471467474 |
|
15 ms | 172.64.150.56 |
| 73 | 2026-08-20 15:25 | 639228363426647311 |
|
31 ms | 104.18.37.200 |
| 72 | 2026-08-20 15:25 | 639228363426647311 |
|
31 ms | 172.64.150.56 |
| 71 | 2026-08-20 14:32 | 639228331681701910 |
|
26 ms | 104.18.37.200 |
| 70 | 2026-08-20 14:32 | 639228331681701910 |
|
26 ms | 172.64.150.56 |
| 69 | 2026-08-20 14:16 | 639228321714746824 |
|
167 ms | 172.64.150.56 |
| 68 | 2026-08-20 14:16 | 639228321714746824 |
|
167 ms | 104.18.37.200 |
| 67 | 2026-08-20 13:59 | 639228311652090262 |
|
39 ms | 104.18.37.200 |
| 66 | 2026-08-20 13:59 | 639228311652090262 |
|
39 ms | 172.64.150.56 |
| 65 | 2026-08-20 13:42 | 639228301670088587 |
|
39 ms | 172.64.150.56 |
| 64 | 2026-08-20 13:42 | 639228301670088587 |
|
39 ms | 104.18.37.200 |
| 63 | 2026-08-20 12:49 | 639228269987976710 |
|
76 ms | 104.18.37.200 |
| 62 | 2026-08-20 12:49 | 639228269987976710 |
|
76 ms | 172.64.150.56 |
| 61 | 2026-08-20 12:33 | 639228260009452308 |
|
144 ms | 172.64.150.56 |
| 60 | 2026-08-20 12:33 | 639228260009452308 |
|
144 ms | 104.18.37.200 |
| 59 | 2026-08-20 12:16 | 639228249661740894 |
|
17 ms | 104.18.37.200 |
| 58 | 2026-08-20 12:16 | 639228249661740894 |
|
17 ms | 172.64.150.56 |
| 57 | 2026-08-20 11:59 | 639228239552680346 |
|
463 ms | 104.18.37.200 |
| 56 | 2026-08-20 11:59 | 639228239552680346 |
|
463 ms | 172.64.150.56 |
| 55 | 2026-08-20 11:06 | 639228207667580819 |
|
26 ms | 172.64.150.56 |
| 54 | 2026-08-20 11:06 | 639228207667580819 |
|
26 ms | 104.18.37.200 |
| 53 | 2026-08-20 10:49 | 639228197494011560 |
|
225 ms | 172.64.150.56 |
| 52 | 2026-08-20 10:49 | 639228197494011560 |
|
225 ms | 104.18.37.200 |
| 51 | 2026-08-20 10:32 | 639228187497039939 |
|
138 ms | 104.18.37.200 |
| 50 | 2026-08-20 10:32 | 639228187497039939 |
|
138 ms | 172.64.150.56 |
| 49 | 2026-08-20 10:15 | 639228177408432646 |
|
23 ms | 104.18.37.200 |
| 48 | 2026-08-20 10:15 | 639228177408432646 |
|
23 ms | 172.64.150.56 |
| 47 | 2026-08-20 09:23 | 639228146356166262 |
|
27 ms | 104.18.37.200 |
| 46 | 2026-08-20 09:23 | 639228146356166262 |
|
27 ms | 172.64.150.56 |
| 45 | 2026-08-20 09:07 | 639228136541505712 |
|
46 ms | 104.18.37.200 |
| 44 | 2026-08-20 09:07 | 639228136541505712 |
|
46 ms | 172.64.150.56 |
| 43 | 2026-08-20 08:51 | 639228126519136598 |
|
- | |
| 42 | 2026-08-20 08:34 | 639228116537148885 |
|
117 ms | 172.64.150.56 |
| 41 | 2026-08-20 08:34 | 639228116537148885 |
|
117 ms | 104.18.37.200 |
| 40 | 2026-08-20 07:42 | 639228085320764351 |
|
178 ms | 172.64.150.56 |
| 39 | 2026-08-20 07:42 | 639228085320764351 |
|
178 ms | 104.18.37.200 |
| 38 | 2026-08-20 07:25 | 639228075444604839 |
|
4047 ms | 104.18.37.200 |
| 37 | 2026-08-20 07:25 | 639228075444604839 |
|
4047 ms | 172.64.150.56 |
| 36 | 2026-08-20 07:09 | 639228065615498985 |
|
32 ms | 104.18.37.200 |
| 35 | 2026-08-20 07:09 | 639228065615498985 |
|
32 ms | 172.64.150.56 |
| 34 | 2026-08-20 06:52 | 639228055675321422 |
|
253 ms | 172.64.150.56 |
| 33 | 2026-08-20 06:52 | 639228055675321422 |
|
253 ms | 104.18.37.200 |
| 32 | 2026-08-20 06:00 | 639228024230839396 |
|
52 ms | 172.64.150.56 |
| 31 | 2026-08-20 06:00 | 639228024230839396 |
|
52 ms | 104.18.37.200 |
| 30 | 2026-08-20 05:44 | 639228014720406505 |
|
2025 ms | 172.64.150.56 |
| 29 | 2026-08-20 05:44 | 639228014720406505 |
|
2025 ms | 104.18.37.200 |
| 28 | 2026-08-20 05:28 | 639228004930827030 |
|
32 ms | 172.64.150.56 |
| 27 | 2026-08-20 05:28 | 639228004930827030 |
|
32 ms | 104.18.37.200 |
| 26 | 2026-08-20 05:11 | 639227995103340154 |
|
27 ms | 172.64.150.56 |
| 25 | 2026-08-20 05:11 | 639227995103340154 |
|
27 ms | 104.18.37.200 |
| 24 | 2026-08-20 04:19 | 639227963811374894 |
|
17 ms | 104.18.37.200 |
| 23 | 2026-08-20 04:19 | 639227963811374894 |
|
17 ms | 172.64.150.56 |
| 22 | 2026-08-20 04:03 | 639227954132571365 |
|
41 ms | 104.18.37.200 |
| 21 | 2026-08-20 04:03 | 639227954132571365 |
|
41 ms | 172.64.150.56 |
| 20 | 2026-08-20 03:47 | 639227944541208342 |
|
23 ms | 172.64.150.56 |
| 19 | 2026-08-20 03:47 | 639227944541208342 |
|
23 ms | 104.18.37.200 |
| 18 | 2026-08-20 03:31 | 639227934657213484 |
|
18 ms | 172.64.150.56 |
| 17 | 2026-08-20 03:31 | 639227934657213484 |
|
18 ms | 104.18.37.200 |
| 16 | 2026-08-20 02:39 | 639227903628145469 |
|
138 ms | 172.64.150.56 |
| 15 | 2026-08-20 02:39 | 639227903628145469 |
|
138 ms | 104.18.37.200 |
| 14 | 2026-08-20 02:23 | 639227893995483475 |
|
12 ms | 172.64.150.56 |
| 13 | 2026-08-20 02:23 | 639227893995483475 |
|
12 ms | 104.18.37.200 |
| 12 | 2026-08-20 02:07 | 639227884280244209 |
|
45 ms | 104.18.37.200 |
| 11 | 2026-08-20 02:07 | 639227884280244209 |
|
45 ms | 172.64.150.56 |
| 10 | 2026-08-20 01:50 | 639227874371147132 |
|
281 ms | 104.18.37.200 |
| 9 | 2026-08-20 01:50 | 639227874371147132 |
|
281 ms | 172.64.150.56 |
| 8 | 2026-08-20 00:58 | 639227843224256432 |
|
29 ms | 172.64.150.56 |
| 7 | 2026-08-20 00:58 | 639227843224256432 |
|
29 ms | 104.18.37.200 |
| 6 | 2026-08-20 00:42 | 639227833720403506 |
|
30 ms | 172.64.150.56 |
| 5 | 2026-08-20 00:42 | 639227833720403506 |
|
30 ms | 104.18.37.200 |
| 4 | 2026-08-20 00:26 | 639227824170728278 |
|
155 ms | 172.64.150.56 |
| 3 | 2026-08-20 00:26 | 639227824170728278 |
|
155 ms | 104.18.37.200 |
| 2 | 2026-08-20 00:11 | 639227814865867570 |
|
57 ms | 104.18.37.200 |
| 1 | 2026-08-20 00:11 | 639227814865867570 |
|
57 ms | 172.64.150.56 |