Check-Host.cc

Domain

fkdb520.com

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

Run a live full scan of fkdb520.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
104.21.80.174, 172.67.152.164
AAAA
2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
MX
NS
annalise.ns.cloudflare.com, johnny.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.

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.

Origin IP Origin ASN CDN ASN Confidence Reasoning
103.27.178.14 AS135357 AS13335 95% cert 9bcb805e… served by 103.27.178.14 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
43.240.147.18 AS135357 AS13335 95% cert 9bcb805e… served by 43.240.147.18 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.27.178.227 AS135357 AS13335 95% cert 9bcb805e… served by 103.27.178.227 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
43.240.147.13 AS135357 AS13335 95% cert 9bcb805e… served by 43.240.147.13 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.27.178.8 AS135357 AS13335 95% cert 9bcb805e… served by 103.27.178.8 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
43.240.147.9 AS135357 AS13335 95% cert 9bcb805e… served by 43.240.147.9 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.27.178.10 AS135357 AS13335 95% cert 9bcb805e… served by 103.27.178.10 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.212.230.106 AS135357 AS13335 95% cert 9bcb805e… served by 103.212.230.106 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.17.119.3 AS135357 AS13335 95% cert 9bcb805e… served by 103.17.119.3 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
43.240.147.4 AS135357 AS13335 95% cert 9bcb805e… served by 43.240.147.4 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.212.230.208 AS135357 AS13335 95% cert 9bcb805e… served by 103.212.230.208 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.212.230.207 AS135357 AS13335 95% cert 9bcb805e… served by 103.212.230.207 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.27.178.12 AS135357 AS13335 95% cert 9bcb805e… served by 103.27.178.12 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.244.150.239 AS135357 AS13335 95% cert 9bcb805e… served by 103.244.150.239 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.17.119.6 AS135357 AS13335 95% cert 9bcb805e… served by 103.17.119.6 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.244.150.244 AS135357 AS13335 95% cert 9bcb805e… served by 103.244.150.244 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.212.230.206 AS135357 AS13335 95% cert 9bcb805e… served by 103.212.230.206 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.244.150.240 AS135357 AS13335 95% cert 9bcb805e… served by 103.244.150.240 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.244.150.241 AS135357 AS13335 95% cert 9bcb805e… served by 103.244.150.241 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.17.119.37 AS135357 AS13335 95% cert 9bcb805e… served by 103.17.119.37 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.27.178.225 AS135357 AS13335 95% cert 9bcb805e… served by 103.27.178.225 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.27.178.228 AS135357 AS13335 95% cert 9bcb805e… served by 103.27.178.228 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.212.230.44 AS135357 AS13335 95% cert 9bcb805e… served by 103.212.230.44 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.212.230.199 AS135357 AS13335 95% cert 9bcb805e… served by 103.212.230.199 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4
103.17.119.12 AS135357 AS13335 95% cert 9bcb805e… served by 103.17.119.12 (AS135357) carries SAN fkdb520.com which currently resolves through Cloudflare (AS13335) at 104.21.80.174, 172.67.152.164, 2606:4700:3035::6815:50ae, 2606:4700:3037::ac43:98a4

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 104.21.80.174 2026-05-25 21:38:03.363 2026-06-22 15:08:57.106
A 172.67.152.164 2026-05-25 21:38:03.363 2026-06-22 15:08:57.106
AAAA 2606:4700:3035::6815:50ae 2026-05-25 21:38:03.363 2026-06-22 15:08:57.106
AAAA 2606:4700:3037::ac43:98a4 2026-05-25 21:38:03.363 2026-06-22 15:08:57.106
NS johnny.ns.cloudflare.com 2026-05-26 02:30:04.450 2026-06-22 15:08:57.106
NS annalise.ns.cloudflare.com 2026-05-26 02:30:04.450 2026-06-22 15:08:57.106