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 2026-08-18. For this date, NameServerHistory found 147 DNS check records, 144 successful responses, 3 failed responses, and 121 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
147
Historical checks stored for this nameserver on selected date
Average Latency
121 ms
Calculated from available response records
Latest Check on Selected Date
2026-08-18 23:45
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
144
Checks that returned a measurable response
Failed Responses
3
Checks with no response or no returned latency
Failure Rate
2%
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 2026-08-18 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 |
|---|---|---|---|---|---|
| 147 | 2026-08-18 23:45 | 639226935204800669 |
|
12 ms | 172.64.150.56 |
| 146 | 2026-08-18 23:45 | 639226935204800669 |
|
12 ms | 104.18.37.200 |
| 145 | 2026-08-18 23:28 | 639226925298919497 |
|
173 ms | 172.64.150.56 |
| 144 | 2026-08-18 23:28 | 639226925298919497 |
|
173 ms | 104.18.37.200 |
| 143 | 2026-08-18 23:12 | 639226915487885053 |
|
35 ms | 172.64.150.56 |
| 142 | 2026-08-18 23:12 | 639226915487885053 |
|
35 ms | 104.18.37.200 |
| 141 | 2026-08-18 22:55 | 639226905465760034 |
|
31 ms | 172.64.150.56 |
| 140 | 2026-08-18 22:55 | 639226905465760034 |
|
31 ms | 104.18.37.200 |
| 139 | 2026-08-18 22:38 | 639226895378104692 |
|
153 ms | 104.18.37.200 |
| 138 | 2026-08-18 22:38 | 639226895378104692 |
|
153 ms | 172.64.150.56 |
| 137 | 2026-08-18 21:45 | 639226863374232622 |
|
38 ms | 104.18.37.200 |
| 136 | 2026-08-18 21:45 | 639226863374232622 |
|
38 ms | 172.64.150.56 |
| 135 | 2026-08-18 21:29 | 639226853698516058 |
|
44 ms | 172.64.150.56 |
| 134 | 2026-08-18 21:29 | 639226853698516058 |
|
44 ms | 104.18.37.200 |
| 133 | 2026-08-18 21:13 | 639226843797360601 |
|
10 ms | 172.64.150.56 |
| 132 | 2026-08-18 21:13 | 639226843797360601 |
|
10 ms | 104.18.37.200 |
| 131 | 2026-08-18 20:56 | 639226834046588155 |
|
- | |
| 130 | 2026-08-18 20:40 | 639226824234488533 |
|
8 ms | 104.18.37.200 |
| 129 | 2026-08-18 20:40 | 639226824234488533 |
|
8 ms | 172.64.150.56 |
| 128 | 2026-08-18 20:24 | 639226814549928621 |
|
51 ms | 172.64.150.56 |
| 127 | 2026-08-18 20:24 | 639226814549928621 |
|
51 ms | 104.18.37.200 |
| 126 | 2026-08-18 20:07 | 639226804721432353 |
|
34 ms | 104.18.37.200 |
| 125 | 2026-08-18 20:07 | 639226804721432353 |
|
34 ms | 172.64.150.56 |
| 124 | 2026-08-18 19:51 | 639226795048828184 |
|
7 ms | 104.18.37.200 |
| 123 | 2026-08-18 19:51 | 639226795048828184 |
|
7 ms | 172.64.150.56 |
| 122 | 2026-08-18 19:35 | 639226785202482420 |
|
142 ms | 104.18.37.200 |
| 121 | 2026-08-18 19:35 | 639226785202482420 |
|
142 ms | 172.64.150.56 |
| 120 | 2026-08-18 19:18 | 639226775309362607 |
|
116 ms | 172.64.150.56 |
| 119 | 2026-08-18 19:18 | 639226775309362607 |
|
116 ms | 104.18.37.200 |
| 118 | 2026-08-18 19:02 | 639226765406586155 |
|
165 ms | 104.18.37.200 |
| 117 | 2026-08-18 19:02 | 639226765406586155 |
|
165 ms | 172.64.150.56 |
| 116 | 2026-08-18 18:45 | 639226755437790519 |
|
270 ms | 172.64.150.56 |
| 115 | 2026-08-18 18:45 | 639226755437790519 |
|
270 ms | 104.18.37.200 |
| 114 | 2026-08-18 17:53 | 639226723856194457 |
|
9 ms | 104.18.37.200 |
| 113 | 2026-08-18 17:53 | 639226723856194457 |
|
9 ms | 172.64.150.56 |
| 112 | 2026-08-18 17:36 | 639226714050583422 |
|
21 ms | 104.18.37.200 |
| 111 | 2026-08-18 17:36 | 639226714050583422 |
|
21 ms | 172.64.150.56 |
| 110 | 2026-08-18 17:20 | 639226704236499724 |
|
40 ms | 104.18.37.200 |
| 109 | 2026-08-18 17:20 | 639226704236499724 |
|
40 ms | 172.64.150.56 |
| 108 | 2026-08-18 17:03 | 639226694184520163 |
|
- | |
| 107 | 2026-08-18 16:46 | 639226684161203477 |
|
2023 ms | 172.64.150.56 |
| 106 | 2026-08-18 16:46 | 639226684161203477 |
|
2023 ms | 104.18.37.200 |
| 105 | 2026-08-18 16:30 | 639226674305430109 |
|
22 ms | 172.64.150.56 |
| 104 | 2026-08-18 16:30 | 639226674305430109 |
|
22 ms | 104.18.37.200 |
| 103 | 2026-08-18 16:14 | 639226664489607984 |
|
20 ms | 172.64.150.56 |
| 102 | 2026-08-18 16:14 | 639226664489607984 |
|
20 ms | 104.18.37.200 |
| 101 | 2026-08-18 15:57 | 639226654533111667 |
|
22 ms | 104.18.37.200 |
| 100 | 2026-08-18 15:57 | 639226654533111667 |
|
22 ms | 172.64.150.56 |
| 99 | 2026-08-18 15:41 | 639226644778594725 |
|
104 ms | 104.18.37.200 |
| 98 | 2026-08-18 15:41 | 639226644778594725 |
|
104 ms | 172.64.150.56 |
| 97 | 2026-08-18 15:24 | 639226634901553621 |
|
12 ms | 104.18.37.200 |
| 96 | 2026-08-18 15:24 | 639226634901553621 |
|
12 ms | 172.64.150.56 |
| 95 | 2026-08-18 15:08 | 639226624921864967 |
|
11 ms | 104.18.37.200 |
| 94 | 2026-08-18 15:08 | 639226624921864967 |
|
11 ms | 172.64.150.56 |
| 93 | 2026-08-18 14:51 | 639226614939419403 |
|
297 ms | 172.64.150.56 |
| 92 | 2026-08-18 14:51 | 639226614939419403 |
|
297 ms | 104.18.37.200 |
| 91 | 2026-08-18 13:58 | 639226583021074771 |
|
52 ms | 172.64.150.56 |
| 90 | 2026-08-18 13:58 | 639226583021074771 |
|
52 ms | 104.18.37.200 |
| 89 | 2026-08-18 13:42 | 639226573279933585 |
|
75 ms | 172.64.150.56 |
| 88 | 2026-08-18 13:42 | 639226573279933585 |
|
75 ms | 104.18.37.200 |
| 87 | 2026-08-18 13:25 | 639226563494036301 |
|
110 ms | 104.18.37.200 |
| 86 | 2026-08-18 13:25 | 639226563494036301 |
|
110 ms | 172.64.150.56 |
| 85 | 2026-08-18 13:09 | 639226553708216256 |
|
95 ms | 172.64.150.56 |
| 84 | 2026-08-18 13:09 | 639226553708216256 |
|
95 ms | 104.18.37.200 |
| 83 | 2026-08-18 12:53 | 639226544003734815 |
|
40 ms | 104.18.37.200 |
| 82 | 2026-08-18 12:53 | 639226544003734815 |
|
40 ms | 172.64.150.56 |
| 81 | 2026-08-18 12:36 | 639226534105733155 |
|
69 ms | 104.18.37.200 |
| 80 | 2026-08-18 12:36 | 639226534105733155 |
|
69 ms | 172.64.150.56 |
| 79 | 2026-08-18 12:20 | 639226524298118898 |
|
36 ms | 104.18.37.200 |
| 78 | 2026-08-18 12:20 | 639226524298118898 |
|
36 ms | 172.64.150.56 |
| 77 | 2026-08-18 12:04 | 639226514525195335 |
|
56 ms | 104.18.37.200 |
| 76 | 2026-08-18 12:04 | 639226514525195335 |
|
56 ms | 172.64.150.56 |
| 75 | 2026-08-18 11:47 | 639226504703635320 |
|
45 ms | 104.18.37.200 |
| 74 | 2026-08-18 11:47 | 639226504703635320 |
|
45 ms | 172.64.150.56 |
| 73 | 2026-08-18 11:31 | 639226494737271720 |
|
21 ms | 172.64.150.56 |
| 72 | 2026-08-18 11:31 | 639226494737271720 |
|
21 ms | 104.18.37.200 |
| 71 | 2026-08-18 11:15 | 639226485005027236 |
|
37 ms | 172.64.150.56 |
| 70 | 2026-08-18 11:15 | 639226485005027236 |
|
37 ms | 104.18.37.200 |
| 69 | 2026-08-18 10:58 | 639226475133236105 |
|
298 ms | 104.18.37.200 |
| 68 | 2026-08-18 10:58 | 639226475133236105 |
|
298 ms | 172.64.150.56 |
| 67 | 2026-08-18 10:04 | 639226442975077052 |
|
160 ms | 104.18.37.200 |
| 66 | 2026-08-18 10:04 | 639226442975077052 |
|
160 ms | 172.64.150.56 |
| 65 | 2026-08-18 09:48 | 639226433317932039 |
|
5 ms | 104.18.37.200 |
| 64 | 2026-08-18 09:48 | 639226433317932039 |
|
5 ms | 172.64.150.56 |
| 63 | 2026-08-18 09:32 | 639226423688431096 |
|
44 ms | 104.18.37.200 |
| 62 | 2026-08-18 09:32 | 639226423688431096 |
|
44 ms | 172.64.150.56 |
| 61 | 2026-08-18 09:16 | 639226413998250045 |
|
39 ms | 172.64.150.56 |
| 60 | 2026-08-18 09:16 | 639226413998250045 |
|
39 ms | 104.18.37.200 |
| 59 | 2026-08-18 09:00 | 639226404284554875 |
|
29 ms | 172.64.150.56 |
| 58 | 2026-08-18 09:00 | 639226404284554875 |
|
29 ms | 104.18.37.200 |
| 57 | 2026-08-18 08:44 | 639226394637043309 |
|
9 ms | 172.64.150.56 |
| 56 | 2026-08-18 08:44 | 639226394637043309 |
|
9 ms | 104.18.37.200 |
| 55 | 2026-08-18 08:28 | 639226385052447582 |
|
- | |
| 54 | 2026-08-18 08:12 | 639226375506189603 |
|
42 ms | 172.64.150.56 |
| 53 | 2026-08-18 08:12 | 639226375506189603 |
|
42 ms | 104.18.37.200 |
| 52 | 2026-08-18 07:56 | 639226365690646426 |
|
142 ms | 104.18.37.200 |
| 51 | 2026-08-18 07:56 | 639226365690646426 |
|
142 ms | 172.64.150.56 |
| 50 | 2026-08-18 07:39 | 639226355771007701 |
|
2025 ms | 172.64.150.56 |
| 49 | 2026-08-18 07:39 | 639226355771007701 |
|
2025 ms | 104.18.37.200 |
| 48 | 2026-08-18 07:23 | 639226345946269369 |
|
32 ms | 104.18.37.200 |
| 47 | 2026-08-18 07:23 | 639226345946269369 |
|
32 ms | 172.64.150.56 |
| 46 | 2026-08-18 07:07 | 639226336241601848 |
|
315 ms | 104.18.37.200 |
| 45 | 2026-08-18 07:07 | 639226336241601848 |
|
315 ms | 172.64.150.56 |
| 44 | 2026-08-18 06:14 | 639226304950675290 |
|
24 ms | 172.64.150.56 |
| 43 | 2026-08-18 06:14 | 639226304950675290 |
|
24 ms | 104.18.37.200 |
| 42 | 2026-08-18 05:58 | 639226295324754616 |
|
20 ms | 172.64.150.56 |
| 41 | 2026-08-18 05:58 | 639226295324754616 |
|
20 ms | 104.18.37.200 |
| 40 | 2026-08-18 05:43 | 639226285824640601 |
|
17 ms | 104.18.37.200 |
| 39 | 2026-08-18 05:43 | 639226285824640601 |
|
17 ms | 172.64.150.56 |
| 38 | 2026-08-18 05:27 | 639226276321223917 |
|
21 ms | 172.64.150.56 |
| 37 | 2026-08-18 05:27 | 639226276321223917 |
|
21 ms | 104.18.37.200 |
| 36 | 2026-08-18 05:11 | 639226266800200046 |
|
13 ms | 104.18.37.200 |
| 35 | 2026-08-18 05:11 | 639226266800200046 |
|
13 ms | 172.64.150.56 |
| 34 | 2026-08-18 04:54 | 639226256958066164 |
|
18 ms | 172.64.150.56 |
| 33 | 2026-08-18 04:54 | 639226256958066164 |
|
18 ms | 104.18.37.200 |
| 32 | 2026-08-18 04:39 | 639226247432364597 |
|
40 ms | 104.18.37.200 |
| 31 | 2026-08-18 04:39 | 639226247432364597 |
|
40 ms | 172.64.150.56 |
| 30 | 2026-08-18 04:22 | 639226237703388552 |
|
27 ms | 172.64.150.56 |
| 29 | 2026-08-18 04:22 | 639226237703388552 |
|
27 ms | 104.18.37.200 |
| 28 | 2026-08-18 04:06 | 639226227937569589 |
|
27 ms | 172.64.150.56 |
| 27 | 2026-08-18 04:06 | 639226227937569589 |
|
27 ms | 104.18.37.200 |
| 26 | 2026-08-18 03:50 | 639226218052465471 |
|
28 ms | 172.64.150.56 |
| 25 | 2026-08-18 03:50 | 639226218052465471 |
|
28 ms | 104.18.37.200 |
| 24 | 2026-08-18 03:34 | 639226208429623997 |
|
158 ms | 104.18.37.200 |
| 23 | 2026-08-18 03:34 | 639226208429623997 |
|
158 ms | 172.64.150.56 |
| 22 | 2026-08-18 03:18 | 639226198800675295 |
|
177 ms | 172.64.150.56 |
| 21 | 2026-08-18 03:18 | 639226198800675295 |
|
177 ms | 104.18.37.200 |
| 20 | 2026-08-18 02:26 | 639226167722042574 |
|
19 ms | 172.64.150.56 |
| 19 | 2026-08-18 02:26 | 639226167722042574 |
|
19 ms | 104.18.37.200 |
| 18 | 2026-08-18 02:10 | 639226158277924383 |
|
49 ms | 104.18.37.200 |
| 17 | 2026-08-18 02:10 | 639226158277924383 |
|
49 ms | 172.64.150.56 |
| 16 | 2026-08-18 01:54 | 639226148757810592 |
|
112 ms | 104.18.37.200 |
| 15 | 2026-08-18 01:54 | 639226148757810592 |
|
112 ms | 172.64.150.56 |
| 14 | 2026-08-18 01:38 | 639226139348611045 |
|
6 ms | 172.64.150.56 |
| 13 | 2026-08-18 01:38 | 639226139348611045 |
|
6 ms | 104.18.37.200 |
| 12 | 2026-08-18 01:23 | 639226129823462907 |
|
21 ms | 104.18.37.200 |
| 11 | 2026-08-18 01:23 | 639226129823462907 |
|
21 ms | 172.64.150.56 |
| 10 | 2026-08-18 01:07 | 639226120218260005 |
|
20 ms | 172.64.150.56 |
| 9 | 2026-08-18 01:07 | 639226120218260005 |
|
20 ms | 104.18.37.200 |
| 8 | 2026-08-18 00:51 | 639226110875503904 |
|
57 ms | 172.64.150.56 |
| 7 | 2026-08-18 00:51 | 639226110875503904 |
|
57 ms | 104.18.37.200 |
| 6 | 2026-08-18 00:35 | 639226101376311912 |
|
9 ms | 172.64.150.56 |
| 5 | 2026-08-18 00:35 | 639226101376311912 |
|
9 ms | 104.18.37.200 |
| 4 | 2026-08-18 00:19 | 639226091924943492 |
|
17 ms | 104.18.37.200 |
| 3 | 2026-08-18 00:19 | 639226091924943492 |
|
17 ms | 172.64.150.56 |
| 2 | 2026-08-18 00:03 | 639226082133158124 |
|
214 ms | 172.64.150.56 |
| 1 | 2026-08-18 00:03 | 639226082133158124 |
|
214 ms | 104.18.37.200 |