Check-Host.cc
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Domain

404bc.workers.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 404bc.workers.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
4
A/AAAA targets
Subdomains
13
CT + scan + body
Record Types
1
seen in DNS
Observed Certs
20
in our scans

DNS Records

A
—
AAAA
—
MX
—
NS
ernest.ns.cloudflare.com, reza.ns.cloudflare.com
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

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
chatgpt.404bc.workers.dev
2606:4700:3034::6815:3d67 172.67.208.241 2606:4700:3031::ac43:d0f1 104.21.61.103
2026-08-22 12:16:07.258
re-route.404bc.workers.dev
2606:4700:3034::6815:3d67 172.67.208.241 104.21.61.103 2606:4700:3031::ac43:d0f1
2026-08-27 15:27:50.811
status.404bc.workers.dev
2606:4700:3034::6815:3d67 172.67.208.241 104.21.61.103 2606:4700:3031::ac43:d0f1
2026-08-07 21:54:07.322
todo.404bc.workers.dev
2606:4700:3034::6815:3d67 172.67.208.241 2606:4700:3031::ac43:d0f1 104.21.61.103
2026-08-12 15:43:44.946
404bc.workers.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.

8610796a5fa03b2e… google · argon2026h2
Subject: 404bc.workers.dev
Issuer: WE1
SANs: 404bc.workers.dev, *.re-route.404bc.workers.dev
Valid: 2026-08-15 04:52:03 → 2026-11-13 05:52:00
b750e82274fe9139… google · argon2026h2
Subject: 404bc.workers.dev
Issuer: WR1
SANs: 404bc.workers.dev, *.re-route.404bc.workers.dev
Valid: 2026-08-15 04:51:53 → 2026-11-13 05:51:49
4fc79113cc5d3977… digicert · wyvern2026h2
Subject: 404bc.workers.dev
Issuer: WE1
SANs: 404bc.workers.dev, *.re-route.404bc.workers.dev
Valid: 2026-08-15 04:31:00 → 2026-11-13 05:30:57
f1152303e154a9b4… digicert · wyvern2026h2
Subject: 404bc.workers.dev
Issuer: WR1
SANs: 404bc.workers.dev, *.re-route.404bc.workers.dev
Valid: 2026-08-15 04:30:51 → 2026-11-13 05:27:56
3fa4d63a9cc12562… google · argon2026h2
Subject: 404bc.workers.dev
Issuer: WE1
SANs: 404bc.workers.dev, *.todo.404bc.workers.dev
Valid: 2026-08-11 23:04:30 → 2026-11-10 00:04:00
3f4409fa2a94ef8b… digicert · wyvern2026h2
Subject: 404bc.workers.dev
Issuer: WR1
SANs: 404bc.workers.dev, *.todo.404bc.workers.dev
Valid: 2026-08-11 23:03:53 → 2026-11-10 00:03:35
b88455e380b5295b… digicert · wyvern2026h2
Subject: 404bc.workers.dev
Issuer: WE1
SANs: 404bc.workers.dev, *.todo.404bc.workers.dev
Valid: 2026-08-11 22:43:52 → 2026-11-09 23:43:37
64a232b305c1de99… digicert · wyvern2026h2
Subject: 404bc.workers.dev
Issuer: WR1
SANs: 404bc.workers.dev, *.todo.404bc.workers.dev
Valid: 2026-08-11 22:43:30 → 2026-11-09 23:40:39
f1d206a6753f67be… digicert · wyvern2026h2
Subject: 404bc.workers.dev
Issuer: WE1
SANs: 404bc.workers.dev, *.chatgpt.404bc.workers.dev
Valid: 2026-08-11 10:45:52 → 2026-11-09 11:45:36
9994200a86c3b98f… digicert · wyvern2026h2
Subject: 404bc.workers.dev
Issuer: WR1
SANs: 404bc.workers.dev, *.chatgpt.404bc.workers.dev
Valid: 2026-08-11 10:45:29 → 2026-11-09 11:45:13
d0d65f3e359b86da… google · argon2026h2
Subject: 404bc.workers.dev
Issuer: WE1
SANs: 404bc.workers.dev, *.chatgpt.404bc.workers.dev
Valid: 2026-08-11 10:34:11 → 2026-11-09 11:33:59
32a6eaf3a4df040b… digicert · wyvern2026h2
Subject: 404bc.workers.dev
Issuer: WR1
SANs: 404bc.workers.dev, *.chatgpt.404bc.workers.dev
Valid: 2026-08-11 10:33:52 → 2026-11-09 11:31:23
8eb09eff2b569ebc… cloudflare · nimbus2026
Subject: 404bc.workers.dev
Issuer: WE1
SANs: 404bc.workers.dev, *.404bc.workers.dev
Valid: 2026-08-08 23:18:15 → 2026-11-07 00:16:46
fd1325c3e3c193e8… google · argon2026h2
Subject: 404bc.workers.dev
Issuer: WE1
SANs: 404bc.workers.dev, *.404bc.workers.dev
Valid: 2026-08-08 23:18:15 → 2026-11-07 00:16:46
7b650353fe784e9c… digicert · wyvern2026h2
Subject: 404bc.workers.dev
Issuer: WE1
SANs: 404bc.workers.dev, *.status.404bc.workers.dev
Valid: 2026-08-06 21:04:54 → 2026-11-04 22:04:27
4f376785b64084e7… digicert · wyvern2026h2
Subject: 404bc.workers.dev
Issuer: WR1
SANs: 404bc.workers.dev, *.status.404bc.workers.dev
Valid: 2026-08-06 21:04:21 → 2026-11-04 22:03:52
63d681205fe97957… digicert · wyvern2026h2
Subject: 404bc.workers.dev
Issuer: WR1
SANs: 404bc.workers.dev, *.status.404bc.workers.dev
Valid: 2026-08-06 20:53:30 → 2026-11-04 21:50:06
a90e90f8518d80fb… digicert · wyvern2026h2
Subject: 404bc.workers.dev
Issuer: WR1
SANs: 404bc.workers.dev, *.re-route.404bc.workers.dev
Valid: 2026-06-17 04:01:25 → 2026-09-15 04:59:07
b92a7c3dcf720bc0… google · xenon2026h2
Subject: 404bc.workers.dev
Issuer: WE1
SANs: 404bc.workers.dev, *.todo.404bc.workers.dev
Valid: 2026-06-13 22:12:51 → 2026-09-11 23:12:38
40f06553fef5c9d4… google · xenon2026h2
Subject: 404bc.workers.dev
Issuer: WE1
SANs: 404bc.workers.dev, *.chatgpt.404bc.workers.dev
Valid: 2026-06-13 09:41:22 → 2026-09-11 10:41:19

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
NS ernest.ns.cloudflare.com 2026-08-07 21:45:22.958 2026-08-27 15:27:50.811
NS reza.ns.cloudflare.com 2026-08-07 21:45:22.958 2026-08-27 15:27:50.811