Check-Host.cc

Domain

secure.intern.facebook.com

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

Run a live full scan of secure.intern.facebook.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
11
A/AAAA targets
Subdomains
CT + scan + body
Record Types
3
seen in DNS
Observed Certs
482
in our scans

DNS Records

A
AAAA
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

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.

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
AAAA 2a03:2880:f36f:86:face:b00c:0:420d 2026-06-15 02:43:51.423 2026-07-28 04:09:46.054
TXT v=spf1 a ~all 2026-06-15 02:43:51.423 2026-07-31 03:52:56.144
A 57.144.222.134 2026-06-15 02:43:51.423 2026-07-28 04:09:46.054
AAAA 2a03:2880:f03f:17:face:b00c:0:420d 2026-06-18 00:30:21.677 2026-07-31 03:51:37.464
A 157.240.253.3 2026-06-18 00:30:21.677 2026-06-18 00:30:21.677
A 157.240.27.23 2026-06-22 06:38:46.268 2026-06-22 06:38:46.268
AAAA 2a03:2880:f37a:86:face:b00c:0:420d 2026-06-22 06:38:46.268 2026-06-22 06:38:46.268
A 157.240.0.11 2026-06-22 11:40:35.757 2026-07-19 15:33:33.696
AAAA 2a03:2880:f083:102:face:b00c:0:420d 2026-06-23 16:21:14.793 2026-07-31 03:52:56.144
AAAA 2a03:2880:f084:10b:face:b00c:0:420d 2026-07-19 15:33:33.696 2026-07-19 15:33:33.696
A 57.144.248.134 2026-07-31 03:51:37.464 2026-07-31 03:51:37.464
A 57.144.244.134 2026-07-31 03:52:56.144 2026-07-31 03:52:56.144