Check-Host.cc
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Domain

4o4.dev

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

DNS Check HTTP Check Run Full Scan .dev TLD

Run a live full scan of 4o4.dev

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
5
A/AAAA targets
Subdomains
8
CT + scan + body
Record Types
5
seen in DNS
Observed Certs
10
in our scans

DNS Records

A
104.21.12.10, 172.67.131.218
AAAA
2606:4700:3032::6815:c0a, 2606:4700:3032::ac43:83da, 2606:4700:3033::ac43:83da
MX
1 aspmx.l.google.com, 10 alt3.aspmx.l.google.com, 10 alt4.aspmx.l.google.com, 5 alt1.aspmx.l.google.com, 5 alt2.aspmx.l.google.com
NS
carioca.ns.cloudflare.com, damon.ns.cloudflare.com
TXT
hosting-site=web-4o4, v=spf1 include:_spf.google.com ~all
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

Every subdomain we know about — harvested from CT-log SANs, scan-observed certs and HTML body references — paired with its current A/AAAA target.

Subdomain Resolves to Last seen
4o4.dev
172.67.131.218 104.21.12.10 2606:4700:3032::6815:c0a 2606:4700:3032::ac43:83da +1
2026-08-30 18:18:50.861
pos.4o4.dev
104.21.12.10 172.67.131.218 2606:4700:3032::6815:c0a 2606:4700:3032::ac43:83da
2026-08-29 09:14:40.123
argonath.4o4.dev DNS pending —
webauthn.4o4.dev DNS pending —

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

No citing IPs found yet

As the world-sweep progresses, hosts referencing this domain in their HTML will surface here.

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.

CT-Log Evidence

Certificates from public Certificate Transparency logs whose subject or SAN names this domain — including historic certs we never observed live.

8968aee5a8a3b686… cloudflare · nimbus2026
Subject: 4o4.dev
Issuer: WR1
SANs: 4o4.dev, argonath.4o4.dev
Valid: 2026-08-28 07:43:35 → 2026-11-26 08:43:32
722361c8deff698d… google · xenon2026h2
Subject: 4o4.dev
Issuer: WE1
SANs: 4o4.dev
Valid: 2026-08-21 21:01:41 → 2026-11-19 22:01:40
f26ba0b470b4a8d2… digicert · wyvern2026h2
Subject: 4o4.dev
Issuer: WE1
SANs: 4o4.dev, *.4o4.dev
Valid: 2026-08-20 09:08:03 → 2026-11-18 10:07:54
78e3822291edd3c6… digicert · wyvern2026h2
Subject: 4o4.dev
Issuer: WE1
SANs: 4o4.dev, *.4o4.dev
Valid: 2026-08-20 05:04:38 → 2026-11-18 06:01:10
4d56b4d306f2515e… digicert · wyvern2026h2
Subject: 4o4.dev
Issuer: WE1
SANs: 4o4.dev, fcm.4o4.dev, *.fcm.4o4.dev
Valid: 2026-08-12 23:29:55 → 2026-11-11 00:29:34
60940a4ed3a54ff4… google · argon2026h2
Subject: 4o4.dev
Issuer: WR1
SANs: 4o4.dev, fcm.4o4.dev, *.fcm.4o4.dev
Valid: 2026-08-12 23:29:27 → 2026-11-11 00:29:14
19bb236d1687c3a3… google · argon2026h2
Subject: 4o4.dev
Issuer: WE1
SANs: 4o4.dev, fcm.4o4.dev, *.fcm.4o4.dev
Valid: 2026-08-12 23:07:18 → 2026-11-11 00:07:03
1ad6554e93d2637d… google · argon2026h2
Subject: 4o4.dev
Issuer: WR1
SANs: 4o4.dev, fcm.4o4.dev, *.fcm.4o4.dev
Valid: 2026-08-12 23:06:56 → 2026-11-11 00:04:36
07698b4af4d9e056… digicert · wyvern2026h2
Subject: 4o4.dev
Issuer: WE1
SANs: 4o4.dev, webauthn.4o4.dev, *.webauthn.4o4.dev
Valid: 2026-08-08 00:32:15 → 2026-11-06 01:32:01
d8111d040720e2de… digicert · wyvern2026h2
Subject: 4o4.dev
Issuer: WR1
SANs: 4o4.dev, webauthn.4o4.dev, *.webauthn.4o4.dev
Valid: 2026-08-08 00:31:54 → 2026-11-06 01:29:12

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
TXT v=spf1 include:_spf.google.com ~all 2026-06-21 17:18:09.109 2026-08-30 18:18:50.861
NS damon.ns.cloudflare.com 2026-06-21 17:18:09.109 2026-08-30 18:18:50.861
TXT hosting-site=web-4o4 2026-06-21 17:18:09.109 2026-08-30 18:18:50.861
NS carioca.ns.cloudflare.com 2026-06-21 17:18:09.109 2026-08-30 18:18:50.861
A 104.21.12.10 2026-06-21 17:18:09.109 2026-08-30 18:18:50.861
AAAA 2606:4700:3033::ac43:83da 2026-06-21 17:18:09.109 2026-06-21 17:18:09.109
AAAA 2606:4700:3032::6815:c0a 2026-06-21 17:18:09.109 2026-08-30 18:18:50.861
MX 5 alt2.aspmx.l.google.com 2026-06-21 17:18:09.109 2026-08-30 18:18:50.861
MX 10 alt4.aspmx.l.google.com 2026-06-21 17:18:09.109 2026-08-30 18:18:50.861
MX 1 aspmx.l.google.com 2026-06-21 17:18:09.109 2026-08-30 18:18:50.861
A 172.67.131.218 2026-06-21 17:18:09.109 2026-08-30 18:18:50.861
MX 5 alt1.aspmx.l.google.com 2026-06-21 17:18:09.109 2026-08-30 18:18:50.861
MX 10 alt3.aspmx.l.google.com 2026-06-21 17:18:09.109 2026-08-30 18:18:50.861
AAAA 2606:4700:3032::ac43:83da 2026-08-21 05:43:03.927 2026-08-30 18:18:50.861