Check-Host.cc

Domain

substackcdn.com

Aggregated from public BGP, CT logs, our scan layer, honeypots and global probes.

Run a live full scan of substackcdn.com

On-demand: ports, banners, TLS, tech-stack, subdomains and origin/IP-leak detection. Results are shared publicly for everyone to link to.

Deep-scan now
Hosting IPs
A/AAAA targets
Subdomains
CT + scan + body
Record Types
seen in DNS
Observed Certs
in our scans

DNS Records

A
18.64.211.101, 18.64.211.2, 18.64.211.30, 18.64.211.57, 3.173.161.11, 3.173.161.14, 3.173.161.73, 3.173.161.96
AAAA
2600:9000:20a2:0:4:b4b9:d3c0:93a1, 2600:9000:20a2:1000:4:b4b9:d3c0:93a1, 2600:9000:20a2:1200:4:b4b9:d3c0:93a1, 2600:9000:20a2:1400:4:b4b9:d3c0:93a1, 2600:9000:20a2:1600:4:b4b9:d3c0:93a1, 2600:9000:20a2:1a00:4:b4b9:d3c0:93a1, 2600:9000:20a2:1c00:4:b4b9:d3c0:93a1, 2600:9000:20a2:1e00:4:b4b9:d3c0:93a1
MX
NS
TXT
CNAME
CAA

WHOIS / Registration

Registration data planned

Registrar, creation/expiry dates and domain status via RDAP. Rolling out gradually — bulk WHOIS is rate-limited, so we resolve on a prioritized cadence.

Subdomains

Subdomain enumeration pending

Every subdomain ever issued a TLS cert under this apex — extracted from Certificate Transparency logs, our own scan observations and body references.

Tech Stack

Tech detection pending

Wappalyzer-rules detect CMS, frameworks, analytics, JS libs and server-side languages on this domain.

TLS Certificates

Certificate observations pending

TLS certs naming this domain in subject or SANs will appear here as our scan-layer catches them.

IPs Citing This Domain

Hosts whose HTML body references this domain. Strong signal for origin/mirror/embed discovery.

18.225.70.231:443 href · ×35
159.65.92.34:80 href · ×24
35.202.203.147:443 href · ×16
160.153.173.174:443 href · ×12
194.195.211.90:8000 href · ×11
91.107.210.214:443 href · ×4
64.119.8.21:443 href · ×3
51.210.151.164:80 href · ×3
144.76.163.157:443 href · ×2
5.78.186.213:80 href · ×1
89.58.53.54:443 href · ×1
3.66.144.108:443 href · ×1
35.232.44.129:443 href · ×1
63.181.102.111:443 href · ×1
44.238.91.251:443 href · ×1
87.99.156.195:8080 href · ×1

Origin / IP-Leak

USP

When a hostname is served behind a CDN (e.g. Cloudflare), the origin server can sometimes be identified by matching its TLS cert against the protected hostname. Findings shown here are heuristic candidates, not guarantees.

No origin-IP leaks detected (yet)

Either this domain doesn't sit behind a CDN, or we haven't seen a TLS cert from a non-CDN IP matching this hostname. Run a fullscan to refresh the cert→IP cross-reference.

Threat Intelligence

Domain threat-intel pending

Matches in URLhaus, OpenPhish, PhishTank, malware feeds, and Spamhaus DBL.

History

Passive DNS — every value this name ever resolved to and when we first / last observed it. Updates every cycle of our forward-DNS crawler.

Type Value First seen Last seen
A 18.64.211.2 2026-05-26 04:11:07.627 2026-07-25 16:24:41.594
A 18.64.211.101 2026-05-26 04:11:07.627 2026-07-25 16:24:41.594
AAAA 2600:9000:20a2:800:4:b4b9:d3c0:93a1 2026-05-26 04:11:07.627 2026-06-20 06:21:08.621
AAAA 2600:9000:20a2:c600:4:b4b9:d3c0:93a1 2026-05-26 04:11:07.627 2026-05-26 15:44:49.846
AAAA 2600:9000:20a2:8400:4:b4b9:d3c0:93a1 2026-05-26 04:11:07.627 2026-05-26 04:11:07.627
AAAA 2600:9000:20a2:4200:4:b4b9:d3c0:93a1 2026-05-26 04:11:07.627 2026-05-26 15:34:31.085
A 18.64.211.30 2026-05-26 04:11:07.627 2026-07-25 16:24:41.594
TXT google-site-verification=tz2v--AUiNuSpVyU440dvghhnTS9kVnvhIWn69muzgs 2026-05-26 04:11:07.627 2026-07-25 16:24:41.594
AAAA 2600:9000:20a2:ee00:4:b4b9:d3c0:93a1 2026-05-26 04:11:07.627 2026-05-26 04:11:07.627
NS ns-1445.awsdns-52.org 2026-05-26 04:11:07.627 2026-07-25 16:24:41.594
AAAA 2600:9000:20a2:8200:4:b4b9:d3c0:93a1 2026-05-26 04:11:07.627 2026-05-26 08:32:12.500
NS ns-98.awsdns-12.com 2026-05-26 04:11:07.627 2026-07-25 16:24:41.594
AAAA 2600:9000:20a2:3400:4:b4b9:d3c0:93a1 2026-05-26 04:11:07.627 2026-06-18 23:03:13.397
AAAA 2600:9000:20a2:3a00:4:b4b9:d3c0:93a1 2026-05-26 04:11:07.627 2026-05-26 04:11:07.627
A 18.64.211.57 2026-05-26 04:11:07.627 2026-07-25 16:24:41.594
NS ns-946.awsdns-54.net 2026-05-26 04:11:07.627 2026-07-25 16:24:41.594
NS ns-1936.awsdns-50.co.uk 2026-05-26 04:11:07.627 2026-07-25 16:24:41.594
AAAA 2600:9000:20a2:9600:4:b4b9:d3c0:93a1 2026-05-26 08:15:11.123 2026-05-26 08:15:11.123
AAAA 2600:9000:20a2:da00:4:b4b9:d3c0:93a1 2026-05-26 08:15:11.123 2026-05-26 08:15:11.123
AAAA 2600:9000:20a2:600:4:b4b9:d3c0:93a1 2026-05-26 08:15:11.123 2026-06-20 21:31:32.295
AAAA 2600:9000:20a2:7a00:4:b4b9:d3c0:93a1 2026-05-26 08:15:11.123 2026-06-20 06:21:08.621
AAAA 2600:9000:20a2:9400:4:b4b9:d3c0:93a1 2026-05-26 08:15:11.123 2026-06-20 06:21:08.621
AAAA 2600:9000:20a2:dc00:4:b4b9:d3c0:93a1 2026-05-26 08:15:11.123 2026-05-26 08:15:11.123
AAAA 2600:9000:20a2:b000:4:b4b9:d3c0:93a1 2026-05-26 08:15:11.123 2026-05-26 08:15:11.123
AAAA 2600:9000:20a2:4c00:4:b4b9:d3c0:93a1 2026-05-26 08:15:11.123 2026-05-26 08:15:11.123
AAAA 2600:9000:20a2:2800:4:b4b9:d3c0:93a1 2026-05-26 08:32:12.500 2026-05-26 08:32:12.500
AAAA 2600:9000:20a2:0:4:b4b9:d3c0:93a1 2026-05-26 08:32:12.500 2026-05-27 16:34:03.150
AAAA 2600:9000:20a2:1c00:4:b4b9:d3c0:93a1 2026-05-26 08:32:12.500 2026-05-26 08:32:12.500
AAAA 2600:9000:20a2:cc00:4:b4b9:d3c0:93a1 2026-05-26 08:32:12.500 2026-05-26 08:32:12.500
AAAA 2600:9000:20a2:1e00:4:b4b9:d3c0:93a1 2026-05-26 08:32:12.500 2026-05-26 20:18:50.725
AAAA 2600:9000:20a2:be00:4:b4b9:d3c0:93a1 2026-05-26 08:32:12.500 2026-06-20 21:31:32.295
AAAA 2600:9000:20a2:8e00:4:b4b9:d3c0:93a1 2026-05-26 15:34:31.085 2026-05-26 15:34:31.085
AAAA 2600:9000:20a2:b200:4:b4b9:d3c0:93a1 2026-05-26 15:34:31.085 2026-05-27 16:34:03.150
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AAAA 2600:9000:20a2:ba00:4:b4b9:d3c0:93a1 2026-05-26 15:34:31.085 2026-05-26 15:34:31.085
AAAA 2600:9000:20a2:aa00:4:b4b9:d3c0:93a1 2026-05-26 15:34:31.085 2026-05-26 15:34:31.085
AAAA 2600:9000:20a2:ac00:4:b4b9:d3c0:93a1 2026-05-26 15:34:31.085 2026-06-15 00:54:33.538
AAAA 2600:9000:20a2:ca00:4:b4b9:d3c0:93a1 2026-05-26 15:44:49.846 2026-05-26 15:44:49.846
AAAA 2600:9000:20a2:d800:4:b4b9:d3c0:93a1 2026-05-26 15:44:49.846 2026-05-27 09:10:16.184
AAAA 2600:9000:20a2:fe00:4:b4b9:d3c0:93a1 2026-05-26 15:44:49.846 2026-06-20 09:22:37.710
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AAAA 2600:9000:20a2:d400:4:b4b9:d3c0:93a1 2026-05-26 20:18:50.725 2026-06-15 00:54:33.538
AAAA 2600:9000:20a2:a200:4:b4b9:d3c0:93a1 2026-05-26 20:18:50.725 2026-05-26 20:18:50.725
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AAAA 2600:9000:20a2:3c00:4:b4b9:d3c0:93a1 2026-05-26 20:18:50.725 2026-05-26 20:18:50.725
AAAA 2600:9000:20a2:ce00:4:b4b9:d3c0:93a1 2026-05-26 20:18:50.725 2026-06-20 09:22:37.710
AAAA 2600:9000:20a2:2a00:4:b4b9:d3c0:93a1 2026-05-26 20:18:50.725 2026-05-26 20:18:50.725
AAAA 2600:9000:20a2:5600:4:b4b9:d3c0:93a1 2026-05-26 20:18:50.725 2026-06-15 00:54:33.538
AAAA 2600:9000:20a2:d200:4:b4b9:d3c0:93a1 2026-05-27 09:10:16.184 2026-06-15 00:54:33.538
AAAA 2600:9000:20a2:c00:4:b4b9:d3c0:93a1 2026-05-27 09:10:16.184 2026-05-27 09:10:16.184
AAAA 2600:9000:20a2:5000:4:b4b9:d3c0:93a1 2026-05-27 09:10:16.184 2026-06-20 21:31:32.295
AAAA 2600:9000:20a2:7600:4:b4b9:d3c0:93a1 2026-05-27 09:10:16.184 2026-06-20 06:21:08.621
AAAA 2600:9000:20a2:9800:4:b4b9:d3c0:93a1 2026-05-27 09:10:16.184 2026-05-27 09:10:16.184
AAAA 2600:9000:20a2:a600:4:b4b9:d3c0:93a1 2026-05-27 11:07:10.214 2026-05-27 11:07:10.214
AAAA 2600:9000:20a2:ea00:4:b4b9:d3c0:93a1 2026-05-27 11:07:10.214 2026-05-27 11:07:10.214
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AAAA 2600:9000:20a2:1a00:4:b4b9:d3c0:93a1 2026-05-27 16:34:03.150 2026-05-27 16:34:03.150
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AAAA 2600:9000:20a2:1000:4:b4b9:d3c0:93a1 2026-05-27 16:34:03.150 2026-05-27 16:34:03.150
A 3.173.161.11 2026-06-15 00:54:33.538 2026-07-25 16:14:56.777
A 3.173.161.14 2026-06-15 00:54:33.538 2026-07-25 16:14:56.777
AAAA 2600:9000:20a2:1200:4:b4b9:d3c0:93a1 2026-06-15 00:54:33.538 2026-06-15 00:54:33.538
AAAA 2600:9000:20a2:3e00:4:b4b9:d3c0:93a1 2026-06-15 00:54:33.538 2026-06-15 00:54:33.538
AAAA 2600:9000:20a2:de00:4:b4b9:d3c0:93a1 2026-06-15 00:54:33.538 2026-06-15 00:54:33.538
A 3.173.161.73 2026-06-15 00:54:33.538 2026-07-25 16:14:56.777
A 3.173.161.96 2026-06-15 00:54:33.538 2026-07-25 16:14:56.777
AAAA 2600:9000:20a2:3200:4:b4b9:d3c0:93a1 2026-06-15 00:54:33.538 2026-06-15 00:54:33.538
AAAA 2600:9000:28dc:a600:4:b4b9:d3c0:93a1 2026-06-15 01:07:50.467 2026-06-15 01:07:50.467
AAAA 2600:9000:28dc:2e00:4:b4b9:d3c0:93a1 2026-06-15 01:07:50.467 2026-07-25 16:24:41.594
AAAA 2600:9000:28dc:ba00:4:b4b9:d3c0:93a1 2026-06-15 01:07:50.467 2026-07-15 20:04:13.980
AAAA 2600:9000:28dc:b200:4:b4b9:d3c0:93a1 2026-06-15 01:07:50.467 2026-07-22 11:36:25.466
AAAA 2600:9000:28dc:ce00:4:b4b9:d3c0:93a1 2026-06-15 01:07:50.467 2026-06-15 01:07:50.467
AAAA 2600:9000:28dc:ec00:4:b4b9:d3c0:93a1 2026-06-15 01:07:50.467 2026-06-15 01:07:50.467
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AAAA 2600:9000:28dc:fc00:4:b4b9:d3c0:93a1 2026-07-22 11:36:25.466 2026-07-25 16:24:41.594
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